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version 1.1, 1999/12/08 05:47:44 version 1.5, 2000/09/23 07:53:24
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   @comment $OpenXM: OpenXM/src/asir-doc/parts/algnum.texi,v 1.4 2000/03/17 02:17:03 noro Exp $
   \BJP
 @node $BBe?tE*?t$K4X$9$k1i;;(B,,, Top  @node $BBe?tE*?t$K4X$9$k1i;;(B,,, Top
 @chapter $BBe?tE*?t$K4X$9$k1i;;(B  @chapter $BBe?tE*?t$K4X$9$k1i;;(B
   \E
   \BEG
   @node Algebraic numbers,,, Top
   @chapter Algebraic numbers
   \E
   
 @menu  @menu
   \BJP
 * $BBe?tE*?t$NI=8=(B::  * $BBe?tE*?t$NI=8=(B::
 * $BBe?tE*?t$N1i;;(B::  * $BBe?tE*?t$N1i;;(B::
 * $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B::  * $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B::
 * $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B::  * $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B::
   \E
   \BEG
   * Representation of algebraic numbers::
   * Operations over algebraic numbers::
   * Operations for uni-variate polynomials over an algebraic number field::
   * Summary of functions for algebraic numbers::
   \E
 @end menu  @end menu
   
   \BJP
 @node $BBe?tE*?t$NI=8=(B,,, $BBe?tE*?t$K4X$9$k1i;;(B  @node $BBe?tE*?t$NI=8=(B,,, $BBe?tE*?t$K4X$9$k1i;;(B
 @section $BBe?tE*?t$NI=8=(B  @section $BBe?tE*?t$NI=8=(B
   \E
   \BEG
   @node Representation of algebraic numbers,,, Algebraic numbers
   @section Representation of algebraic numbers
   \E
   
 @noindent  @noindent
   \BJP
 @b{Asir} $B$K$*$$$F$O(B, $BBe?tBN$H$$$&BP>]$ODj5A$5$l$J$$(B.  @b{Asir} $B$K$*$$$F$O(B, $BBe?tBN$H$$$&BP>]$ODj5A$5$l$J$$(B.
 $BFHN)$7$?BP>]$H$7$FDj5A$5$l$k$N$O(B, $BBe?tE*?t$G$"$k(B.  $BFHN)$7$?BP>]$H$7$FDj5A$5$l$k$N$O(B, $BBe?tE*?t$G$"$k(B.
 $BBe?tBN$O(B, $BM-M}?tBN$K(B, $BBe?tE*?t$rM-8B8D(B  $BBe?tBN$O(B, $BM-M}?tBN$K(B, $BBe?tE*?t$rM-8B8D(B
Line 19 
Line 41 
 $B$3$l$^$GDj5A$5$l$?Be?tE*?t$NB?9`<0$r78?t$H$9$k(B 1 $BJQ?tB?9`<0(B  $B$3$l$^$GDj5A$5$l$?Be?tE*?t$NB?9`<0$r78?t$H$9$k(B 1 $BJQ?tB?9`<0(B
 $B$rDj5AB?9`<0$H$7$FDj5A$5$l$k(B. $B0J2<(B, $B$"$kDj5AB?9`<0$N:,$H$7$F(B  $B$rDj5AB?9`<0$H$7$FDj5A$5$l$k(B. $B0J2<(B, $B$"$kDj5AB?9`<0$N:,$H$7$F(B
 $BDj5A$5$l$?Be?tE*?t$r(B, @code{root} $B$H8F$V$3$H$K$9$k(B.  $BDj5A$5$l$?Be?tE*?t$r(B, @code{root} $B$H8F$V$3$H$K$9$k(B.
   \E
   \BEG
   In @b{Asir} algebraic number fields are not defined
   as independent objects.
   Instead, individual algebraic numbers are defined by some
   means. In @b{Asir} an algebraic number field is
   defined virtually as a number field obtained by adjoining a finite number
   of algebraic numbers to the rational number field.
   
   A new algebraic number is introduced in @b{Asir} in such a way where
   it is defined as a root of an uni-variate polynomial
   whose coefficients include already defined algebraic numbers
   as well as rational numbers.
   We shall call such a newly defined algebraic number a @b{root}.
   Also, we call such an uni-variate polynomial the defining polynomial
   of that @b{root}.
   \E
   
 @example  @example
 [0] A0=newalg(x^2+1);  [0] A0=newalg(x^2+1);
Line 30 
Line 69 
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 $B$3$NNc$G$O(B, @code{A0} $B$O(B @code{x^2+1=0} $B$N:,(B, @code{A1} $B$O(B, $B$=$N(B @code{A0}  $B$3$NNc$G$O(B, @code{A0} $B$O(B @code{x^2+1=0} $B$N:,(B, @code{A1} $B$O(B, $B$=$N(B @code{A0}
 $B$r78?t$K4^$`(B @code{x^3+A0*x+A0=0} $B$N:,$H$7$FDj5A$5$l$F$$$k(B.  $B$r78?t$K4^$`(B @code{x^3+A0*x+A0=0} $B$N:,$H$7$FDj5A$5$l$F$$$k(B.
   \E
   \BEG
   In this example, the algebraic number assigned to @code{A0} is defined
   as a @b{root} of a polynomial @code{x^2+1};
   that of @code{A1} is defined as a @b{root} of a polynomial
   @code{x^3+A0*x+A0}, which you see contains the previously defined
   @b{root} (@code{A0}) in its coefficients.
   \E
   
 @noindent  @noindent
 @code{newalg()} $B$N0z?t$9$J$o$ADj5AB?9`<0$K$O<!$N$h$&$J@)8B$,$"$k(B.  \JP @code{newalg()} $B$N0z?t$9$J$o$ADj5AB?9`<0$K$O<!$N$h$&$J@)8B$,$"$k(B.
   \BEG
   The argument to @code{newalg()}, i.e., the defining polynomial,
   must satisfy the following conditions.
   \E
   
 @enumerate  @enumerate
 @item  @item
 $BDj5AB?9`<0$O(B 1 $BJQ?tB?9`<0$G$J$1$l$P$J$i$J$$(B.  \JP $BDj5AB?9`<0$O(B 1 $BJQ?tB?9`<0$G$J$1$l$P$J$i$J$$(B.
   \EG A defining polynomial must be an uni-variate polynomial.
   
   
 @item  @item
   \BJP
 @code{newalg()} $B$N0z?t$G$"$kDj5AB?9`<0$O(B, $BBe?tE*?t$r4^$`<0$N4JC12=$N$?(B  @code{newalg()} $B$N0z?t$G$"$kDj5AB?9`<0$O(B, $BBe?tE*?t$r4^$`<0$N4JC12=$N$?(B
 $B$a$KMQ$$$i$l$k(B. $B$3$N4JC12=$O(B, $BAH$_9~$_H!?t(B @code{srem()} $B$KAjEv$9$kFb(B  $B$a$KMQ$$$i$l$k(B. $B$3$N4JC12=$O(B, $BAH$_9~$_H!?t(B @code{srem()} $B$KAjEv$9$kFb(B
 $BIt%k!<%A%s$rMQ$$$F9T$o$l$k(B. $B$3$N$?$a(B, $BDj5AB?9`<0$N<g78?t$O(B, $BM-M}?t$K(B  $BIt%k!<%A%s$rMQ$$$F9T$o$l$k(B. $B$3$N$?$a(B, $BDj5AB?9`<0$N<g78?t$O(B, $BM-M}?t$K(B
 $B$J$C$F$$$kI,MW$,$"$k(B.  $B$J$C$F$$$kI,MW$,$"$k(B.
   \E
   \BEG
   A defining polynomial is used
   to simplify expressions containing that algebraic number.
   The procedure of such simplification is performed by an internal routine
   similar to the built-in function @code{srem()}, where the defining
   polynomial is used for the second argument, the divisor.
   By this reason, the leading coefficient of the defining polynomial
   must be a rational number (must not be an algebraic number.)
   \E
   
 @item  @item
   \BJP
 $BDj5AB?9`<0$N78?t$O(B $B$9$G$KDj5A$5$l$F$$$k(B @code{root} $B$NM-M}?t78?tB?9`<0(B  $BDj5AB?9`<0$N78?t$O(B $B$9$G$KDj5A$5$l$F$$$k(B @code{root} $B$NM-M}?t78?tB?9`<0(B
 $B$G$J$1$l$P$J$i$J$$(B.  $B$G$J$1$l$P$J$i$J$$(B.
   \E
   \BEG
   Every coefficients of a defining polynomial must be
   a `(multi-variate) polynomial' in already defined @b{root}'s.
   Here, `(multi-variate) polynomial' means a mathematical concept,
   not the object type `polynomial' in @b{Asir}.
   \E
 @item  @item
   \BJP
 $BDj5AB?9`<0$O(B, $B$=$N78?t$K4^$^$l$kA4$F$N(B @code{root} $B$rM-M}?t$KE:2C$7$?(B  $BDj5AB?9`<0$O(B, $B$=$N78?t$K4^$^$l$kA4$F$N(B @code{root} $B$rM-M}?t$KE:2C$7$?(B
 $BBN>e$G4{Ls$G$J$1$l$P$J$i$J$$(B.  $BBN>e$G4{Ls$G$J$1$l$P$J$i$J$$(B.
   \E
   \BEG
   A defining polynomial must be irreducible over the field that is obtained
   by adjoining all @b{root}'s contained in its coefficients
   to the rational number field.
   \E
 @end enumerate  @end enumerate
   
 @noindent  @noindent
   \BJP
 @code{newalg()} $B$,9T$&0z?t%A%'%C%/$O(B, 1 $B$*$h$S(B 2 $B$N$_$G$"$k(B.  @code{newalg()} $B$,9T$&0z?t%A%'%C%/$O(B, 1 $B$*$h$S(B 2 $B$N$_$G$"$k(B.
 $BFC$K(B, $B0z?t$NDj5AB?9`<0$N4{Ls@-$OA4$/%A%'%C%/$5$l$J$$(B. $B$3$l$O(B  $BFC$K(B, $B0z?t$NDj5AB?9`<0$N4{Ls@-$OA4$/%A%'%C%/$5$l$J$$(B. $B$3$l$O(B
 $B4{Ls@-$N%A%'%C%/$,B?Bg$J7W;;NL$rI,MW$H$9$k$?$a$G(B, $B$3$NE@$K4X$7$F$O(B,  $B4{Ls@-$N%A%'%C%/$,B?Bg$J7W;;NL$rI,MW$H$9$k$?$a$G(B, $B$3$NE@$K4X$7$F$O(B,
 $B%f!<%6$N@UG$$KG$$5$l$F$$$k(B.  $B%f!<%6$N@UG$$KG$$5$l$F$$$k(B.
   \E
   \BEG
   Only the first two conditions (1 and 2) are checked
   by function @code{newalg()}.
   Among all, it should be emphasized that no check is done for the
   irreducibility at all.
   The reason is that the irreducibility test requires enormously much
   computation time.  You are trusted whether to check it at your own risk.
   \E
   
 @noindent  @noindent
   \BJP
 $B0lC6(B @code{newalg()} $B$K$h$C$FDj5A$5$l$?Be?tE*?t$O(B, $B?t$H$7$F$N<1JL;R$r;}$A(B,  $B0lC6(B @code{newalg()} $B$K$h$C$FDj5A$5$l$?Be?tE*?t$O(B, $B?t$H$7$F$N<1JL;R$r;}$A(B,
 $B$^$?(B, $B?t$NCf$G$OBe?tE*?t$H$7$F$N<1JL;R$r;}$D(B. (@code{type()}, @code{vtype()}  $B$^$?(B, $B?t$NCf$G$OBe?tE*?t$H$7$F$N<1JL;R$r;}$D(B. (@code{type()}, @code{vtype()}
 $B;2>H(B.) $B$5$i$K(B, $BM-M}?t$H(B, @code{root} $B$NM-M}<0$bF1MM$KBe?tE*?t$H$J$k(B.  $B;2>H(B.) $B$5$i$K(B, $BM-M}?t$H(B, @code{root} $B$NM-M}<0$bF1MM$KBe?tE*?t$H$J$k(B.
   \E
   \BEG
   Once a @b{root} has been defined by @code{newalg()} function,
   it is given the type identifier for a number, and furthermore,
   the sub-type identifier for an algebraic number.
   (@xref{type}, @ref{ntype}.)
   Also, any rational combination of rational numbers and @b{root}'s
   is an algebraic number.
   \E
   
 @example  @example
 [87] N=(A0^2+A1)/(A1^2-A0-1);  [87] N=(A0^2+A1)/(A1^2-A0-1);
Line 75 
Line 172 
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 $BNc$+$i$o$+$k$h$&$K(B, @code{root}$B$O(B @code{#@var{n}}  $BNc$+$i$o$+$k$h$&$K(B, @code{root}$B$O(B @code{#@var{n}}
 $B$HI=<($5$l$k(B. $B$7$+$7(B, $B%f!<%6$O$3$N7A$G$OF~NO$G$-$J$$(B. @code{root} $B$O(B  $B$HI=<($5$l$k(B. $B$7$+$7(B, $B%f!<%6$O$3$N7A$G$OF~NO$G$-$J$$(B. @code{root} $B$O(B
 $BJQ?t$K3JG<$7$FMQ$$$k$+(B, $B$"$k$$$O(B @code{alg(@var{n})} $B$K$h$j<h$j=P$9(B.  $BJQ?t$K3JG<$7$FMQ$$$k$+(B, $B$"$k$$$O(B @code{alg(@var{n})} $B$K$h$j<h$j=P$9(B.
 $B$^$?(B, $B8zN($OMn$A$k$,(B, $BA4$/F1$80z?t(B ($BJQ?t$O0[$J$C$F$$$F$b$h$$(B) $B$K$h$j(B  $B$^$?(B, $B8zN($OMn$A$k$,(B, $BA4$/F1$80z?t(B ($BJQ?t$O0[$J$C$F$$$F$b$h$$(B) $B$K$h$j(B
 @code{newalg()} $B$r8F$Y$P(B, $B?7$7$$Be?tE*?t$ODj5A$5$l$:$K4{$KDj5A$5$l$?(B  @code{newalg()} $B$r8F$Y$P(B, $B?7$7$$Be?tE*?t$ODj5A$5$l$:$K4{$KDj5A$5$l$?(B
 $B$b$N$,F@$i$l$k(B.  $B$b$N$,F@$i$l$k(B.
   \E
   \BEG
   As you see it in the example, a @b{root} is displayed as
   @code{#@var{n}}.  But, you cannot input that @b{root} in
   its immediate output form.
   You have to refer to a @b{root} by a program variable assigned
   to the @b{root}, or to get it by @code{alg(@var{n})} function, or by
   several other indirect means.
   A strange use of @code{newalg()}, with a same argument polynomial
   (except for the name of its main variable), will yield the old
   @b{root} instead of a new @b{root} though it is apparently inefficient.
   \E
   
 @example  @example
 [90] alg(0);  [90] alg(0);
Line 90 
Line 200 
 @end example  @end example
   
 @noindent  @noindent
 @code{root} $B$NDj5AB?9`<0$O(B, @code{defpoly()} $B$K$h$j<h$j=P$;$k(B.  \JP @code{root} $B$NDj5AB?9`<0$O(B, @code{defpoly()} $B$K$h$j<h$j=P$;$k(B.
   \BEG
   The defining polynomial of a @b{root} can be obtained by
   @code{defpoly()} function.
   \E
   
 @example  @example
 [96] defpoly(A0);  [96] defpoly(A0);
Line 100  t#1^3+t#0*t#1+t#0
Line 214  t#1^3+t#0*t#1+t#0
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 $B$3$3$G8=$l$?(B, @code{t#0}, @code{t#1} $B$O$=$l$>$l(B @code{#0}, @code{#1} $B$K(B  $B$3$3$G8=$l$?(B, @code{t#0}, @code{t#1} $B$O$=$l$>$l(B @code{#0}, @code{#1} $B$K(B
 $BBP1~$9$kITDj85$G$"$k(B. $B$3$l$i$b%f!<%6$,F~NO$9$k$3$H$O$G$-$J$$(B.  $BBP1~$9$kITDj85$G$"$k(B. $B$3$l$i$b%f!<%6$,F~NO$9$k$3$H$O$G$-$J$$(B.
 @code{var()} $B$G<h$j=P$9$+(B, $B$"$k$$$O(B @code{algv(@var{n})} $B$K$h$j<h$j=P$9(B.  @code{var()} $B$G<h$j=P$9$+(B, $B$"$k$$$O(B @code{algv(@var{n})} $B$K$h$j<h$j=P$9(B.
   \E
   \BEG
   Here, you see a strange expression, @code{t#0} and @code{t#1}.
   They are a specially indeterminates generated and maintained
   by @b{Asir} internally.  Indeterminate @code{t#0} corresponds to
   @b{root} @code{#0}, and @code{t#0} to @code{#1}.  These indeterminates
   also cannot be input directly by a user in their immediate forms.
   You can get them by several ways: by @code{var()} function,
   or @code{algv(@var{n})} function.
   \E
   
 @example  @example
 [98] var(@@);  [98] var(@@);
Line 112  t#0
Line 237  t#0
 [100]  [100]
 @end example  @end example
   
   \BJP
 @node $BBe?tE*?t$N1i;;(B,,, $BBe?tE*?t$K4X$9$k1i;;(B  @node $BBe?tE*?t$N1i;;(B,,, $BBe?tE*?t$K4X$9$k1i;;(B
 @section $BBe?tE*?t$N1i;;(B  @section $BBe?tE*?t$N1i;;(B
   \E
   \BEG
   @node Operations over algebraic numbers,,, Algebraic numbers
   @section Operations over algebraic numbers
   \E
   
 @noindent  @noindent
   \BJP
 $BA0@a$G(B, $BBe?tE*?t$NI=8=(B, $BDj5A$K$D$$$F=R$Y$?(B. $B$3$3$G$O(B, $BBe?tE*?t$rMQ$$$?(B  $BA0@a$G(B, $BBe?tE*?t$NI=8=(B, $BDj5A$K$D$$$F=R$Y$?(B. $B$3$3$G$O(B, $BBe?tE*?t$rMQ$$$?(B
 $B1i;;$K$D$$$F=R$Y$k(B. $BBe?tE*?t$K4X$7$F$O(B, $BAH$_9~$_H!?t$H$7$FDs6!$5$l$F$$$k(B  $B1i;;$K$D$$$F=R$Y$k(B. $BBe?tE*?t$K4X$7$F$O(B, $BAH$_9~$_H!?t$H$7$FDs6!$5$l$F$$$k(B
 $B5!G=$O$4$/>/?t$G(B, $BBgItJ,$O%f!<%6Dj5AH!?t$K$h$j<B8=$5$l$F$$$k(B. $B%U%!%$%k(B  $B5!G=$O$4$/>/?t$G(B, $BBgItJ,$O%f!<%6Dj5AH!?t$K$h$j<B8=$5$l$F$$$k(B. $B%U%!%$%k(B
 $B$O(B, @samp{sp} $B$G(B, @samp{gr} $B$HF1MM(B @b{Asir} $B$NI8=`%i%$%V%i%j%G%#%l%/%H%j(B  $B$O(B, @samp{sp} $B$G(B, @samp{gr} $B$HF1MM(B @b{Asir} $B$NI8=`%i%$%V%i%j%G%#%l%/%H%j(B
 $B$K$*$+$l$F$$$k(B.  $B$K$*$+$l$F$$$k(B.
   \E
   \BEG
   In the previous section, we explained about the
   representation of algebraic numbers and their defining method.
   Here, we describe operations on algebraic numbers.
   Only a few functions are built-in, and almost all functions are provided
   as user defined functions.  The file containing their definitions is
   @samp{sp}, and it is placed under the same directory
   as @samp{gr} is placed, i.e., the standard library directory of @b{Asir}.
   \E
   
 @example  @example
 [0] load("gr")$  [0] load("gr")$
Line 128  t#0
Line 270  t#0
 @end example  @end example
   
 @noindent  @noindent
 $B$"$k$$$O(B, $B>o$KMQ$$$k$J$i$P(B, @samp{$HOME/.asirrc} $B$K=q$$$F$*$/$N$b$h$$(B.  \JP $B$"$k$$$O(B, $B>o$KMQ$$$k$J$i$P(B, @samp{$HOME/.asirrc} $B$K=q$$$F$*$/$N$b$h$$(B.
   \BEG
   Or if you always need them, it is more convenient to include the
   @code{load} commands in @samp{$HOME/.asirrc}.
   \E
   
 @noindent  @noindent
   \BJP
 @code{root} $B$O(B $B$=$NB>$N?t$HF1MM(B, $B;MB'1i;;$,2DG=$H$J$k(B. $B$7$+$7(B, $BDj5AB?(B  @code{root} $B$O(B $B$=$NB>$N?t$HF1MM(B, $B;MB'1i;;$,2DG=$H$J$k(B. $B$7$+$7(B, $BDj5AB?(B
 $B9`<0$K$h$k4JC12=$O<+F0E*$K$O9T$o$l$J$$$N$G(B, $B%f!<%6$NH=CG$GE,599T$o(B  $B9`<0$K$h$k4JC12=$O<+F0E*$K$O9T$o$l$J$$$N$G(B, $B%f!<%6$NH=CG$GE,599T$o(B
 $B$J$1$l$P$J$i$J$$(B. $BFC$K(B, $BJ,Jl$,(B 0 $B$K$J$k>l9g$KCWL?E*$J%(%i!<$H$J$k$?$a(B,  $B$J$1$l$P$J$i$J$$(B. $BFC$K(B, $BJ,Jl$,(B 0 $B$K$J$k>l9g$KCWL?E*$J%(%i!<$H$J$k$?$a(B,
 $B<B:]$KJ,Jl$r;}$DBe?tE*?t$r@8@.$9$k>l9g$K$O:Y?4$NCm0U$,I,MW$H$J$k(B.  $B<B:]$KJ,Jl$r;}$DBe?tE*?t$r@8@.$9$k>l9g$K$O:Y?4$NCm0U$,I,MW$H$J$k(B.
   \E
   \BEG
   Like the other numbers, algebraic numbers can get arithmetic operations
   applied. Simplification, however, by defining polynomials are
   not automatically performed.  It is left to users to simplify their
   expressions.  A fatal error shall result if the denominator expression
   will be simplified to 0.  Therefore, be careful enough when you
   will create and deal with algebraic numbers which may denominators
   in their expressions.
   \E
   
 @noindent  \JP $BBe?tE*?t$N(B, $BDj5AB?9`<0$K$h$k4JC12=$O(B, @code{simpalg()} $B$G9T$&(B.
 $BBe?tE*?t$N(B, $BDj5AB?9`<0$K$h$k4JC12=$O(B, @code{simpalg()} $B$G9T$&(B.  \BEG
   Use @code{simpalg()} function for simplification of algebraic numbers
   by defining polynomials.
   \E
   
 @example  @example
 [49] T=A0^2+1;  [49] T=A0^2+1;
Line 147  t#0
Line 307  t#0
 @end example  @end example
   
 @noindent  @noindent
 @code{simpalg()} $B$OM-M}<0$N7A$r$7$?Be?tE*?t$r(B, $BB?9`<0$N7A$K4JC12=$9$k(B.  \JP @code{simpalg()} $B$OM-M}<0$N7A$r$7$?Be?tE*?t$r(B, $BB?9`<0$N7A$K4JC12=$9$k(B.
   \BEG
   Function @code{simpalg()} simplifies algebraic numbers which have
   the same structures as rational expressions in their appearances.
   \E
   
 @example  @example
 [39] A0=newalg(x^2+1);  [39] A0=newalg(x^2+1);
Line 166  stopped in invalgp at line 258 in file "/usr/local/lib
Line 330  stopped in invalgp at line 258 in file "/usr/local/lib
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 $B$3$NNc$G$O(B, $BJ,Jl$,(B 0 $B$NBe?tE*?t$r4JC12=$7$h$&$H$7$F(B 0 $B$K$h$k=|;;$,@8$8(B  $B$3$NNc$G$O(B, $BJ,Jl$,(B 0 $B$NBe?tE*?t$r4JC12=$7$h$&$H$7$F(B 0 $B$K$h$k=|;;$,@8$8(B
 $B$?$?$a(B, $B%f!<%6Dj5AH!?t$G$"$k(B @code{simpalg()} $B$NCf$G%G%P%C%,$,8F$P$l$?(B  $B$?$?$a(B, $B%f!<%6Dj5AH!?t$G$"$k(B @code{simpalg()} $B$NCf$G%G%P%C%,$,8F$P$l$?(B
 $B$3$H$r<($9(B. @code{simpalg()} $B$O(B, $BBe?tE*?t$r78?t$H$9$kB?9`<0$N(B  $B$3$H$r<($9(B. @code{simpalg()} $B$O(B, $BBe?tE*?t$r78?t$H$9$kB?9`<0$N(B
 $B3F78?t$r4JC12=$G$-$k(B.  $B3F78?t$r4JC12=$G$-$k(B.
   \E
   \BEG
   This example shows an error caused by zero division in the course of
   program execution of @code{simpalg()}, which attempted to simplify
   an algebraic number expression of which the denominator is 0.
   
   Function @code{simpalg()} also can take a polynomial as its argument
   and simplifies algebraic numbers in its coefficients.
   \E
   
 @example  @example
 [43] simpalg(1/A0*x+1/(A0+1));  [43] simpalg(1/A0*x+1/(A0+1));
 (-#0)*x+(-1/2*#0+1/2)  (-#0)*x+(-1/2*#0+1/2)
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 $BBe?tE*?t$r78?t$H$9$kB?9`<0$N4pK\1i;;$O(B, $BE,59(B @code{simpalg()} $B$r8F$V$3$H$r(B  $BBe?tE*?t$r78?t$H$9$kB?9`<0$N4pK\1i;;$O(B, $BE,59(B @code{simpalg()} $B$r8F$V$3$H$r(B
 $B=|$1$PDL>o$N>l9g$HF1MM$G$"$k$,(B, $B0x?tJ,2r$J$I$GIQHK$KMQ$$$i$l$k%N%k%`$N(B  $B=|$1$PDL>o$N>l9g$HF1MM$G$"$k$,(B, $B0x?tJ,2r$J$I$GIQHK$KMQ$$$i$l$k%N%k%`$N(B
 $B7W;;$J$I$K$*$$$F$O(B, @code{root} $B$rITDj85$KCV$-49$($kI,MW$,=P$F$/$k(B.  $B7W;;$J$I$K$*$$$F$O(B, @code{root} $B$rITDj85$KCV$-49$($kI,MW$,=P$F$/$k(B.
 $B$3$N>l9g(B, @code{algptorat()} $B$rMQ$$$k(B.  $B$3$N>l9g(B, @code{algptorat()} $B$rMQ$$$k(B.
   \E
   \BEG
   Thus, you can operate in polynomials which contain algebraic numbers
   as you do usually in ordinary polynomials,
   except for proper simplification by @code{simpalg()}.
   You may sometimes feel needs to convert @b{root}'s into indeterminates,
   especially when you are working for norm computation in algorithms for
   algebraic factorization.
   Function @code{algptorat()} is used for such cases.
   \E
   
 @example  @example
 [83] A0=newalg(x^2+1);  [83] A0=newalg(x^2+1);
Line 196  t#1^2+t#0*t#1+2*t#0
Line 381  t#1^2+t#0*t#1+2*t#0
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 $B$3$N$h$&$K(B, @code{algptorat()} $B$O(B, $BB?9`<0(B, $B?t$K4^$^$l$k(B @code{root}  $B$3$N$h$&$K(B, @code{algptorat()} $B$O(B, $BB?9`<0(B, $B?t$K4^$^$l$k(B @code{root}
 $B$r(B, $BBP1~$9$kITDj85(B, $B$9$J$o$A(B @code{#@var{n}} $B$KBP$9$k(B @code{t#@var{n}}  $B$r(B, $BBP1~$9$kITDj85(B, $B$9$J$o$A(B @code{#@var{n}} $B$KBP$9$k(B @code{t#@var{n}}
 $B$KCV$-49$($k(B. $B4{$K=R$Y$?$h$&$K(B, $B$3$NITDj85$O%f!<%6$,F~NO$9$k$3$H$O$G$-$J$$(B.  $B$KCV$-49$($k(B. $B4{$K=R$Y$?$h$&$K(B, $B$3$NITDj85$O%f!<%6$,F~NO$9$k$3$H$O$G$-$J$$(B.
 $B$3$l$O(B, $B%f!<%6$NF~NO$7$?ITDj85$H(B, @code{root} $B$KBP1~$9$kITDj85$,0lCW(B  $B$3$l$O(B, $B%f!<%6$NF~NO$7$?ITDj85$H(B, @code{root} $B$KBP1~$9$kITDj85$,0lCW(B
 $B$7$J$$$h$&$K$9$k$?$a$G$"$k(B.  $B$7$J$$$h$&$K$9$k$?$a$G$"$k(B.
   \E
   \BEG
   As you see by the example,
   function @code{algptorat()} converts @b{root}'s, @code{#@var{n}},
   in polynomials and numbers into its associated indeterminates,
   @code{t#@var{n}}.  As was already mentioned those indeterminates cannot
   be directly input in their immediate form.
   The restriction is adopted to avoid the confusion that might happen
   if the user could input such internally generatable indeterminates.
   \E
   
 @noindent  @noindent
   \BJP
 $B5U$K(B, @code{root} $B$KBP1~$9$kITDj85$r(B, $BBP1~$9$k(B @code{root} $B$KCV$-49$($k(B  $B5U$K(B, @code{root} $B$KBP1~$9$kITDj85$r(B, $BBP1~$9$k(B @code{root} $B$KCV$-49$($k(B
 $B$?$a$K$O(B @code{rattoalgp()} $B$rMQ$$$k(B.  $B$?$a$K$O(B @code{rattoalgp()} $B$rMQ$$$k(B.
   \E
   \BEG
   The associated indeterminate to a @b{root} is reversely converted
   into the @b{root} by @code{rattoalgp()} function.
   \E
   
 @example  @example
 [88] rattoalgp(S,[alg(0)]);  [88] rattoalgp(S,[alg(0)]);
Line 222  t#1^2+t#0*t#1+2*t#0
Line 424  t#1^2+t#0*t#1+2*t#0
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 @code{rattoalgp()} $B$O(B, $BCV49$NBP>]$H$J$k(B @code{root} $B$N%j%9%H$rBh(B 2 $B0z?t(B  @code{rattoalgp()} $B$O(B, $BCV49$NBP>]$H$J$k(B @code{root} $B$N%j%9%H$rBh(B 2 $B0z?t(B
 $B$K$H$j(B, $B:8$+$i=g$K(B, $BBP1~$9$kITDj85$rCV$-49$($F9T$/(B. $B$3$NNc$O(B,  $B$K$H$j(B, $B:8$+$i=g$K(B, $BBP1~$9$kITDj85$rCV$-49$($F9T$/(B. $B$3$NNc$O(B,
 $BCV49$9$k=g=x$r49$($k$H4JC12=$r9T$o$J$$$3$H$K$h$j7k2L$,0l8+0[$J$k$,(B,  $BCV49$9$k=g=x$r49$($k$H4JC12=$r9T$o$J$$$3$H$K$h$j7k2L$,0l8+0[$J$k$,(B,
 $B4JC12=$K$h$j<B$O0lCW$9$k$3$H$r<($7$F$$$k(B. @code{algptorat()},  $B4JC12=$K$h$j<B$O0lCW$9$k$3$H$r<($7$F$$$k(B. @code{algptorat()},
 @code{rattoalgp()} $B$O(B, $B%f!<%6$,FH<+$N4JC12=$r9T$$$?$$>l9g$J$I$K$b(B  @code{rattoalgp()} $B$O(B, $B%f!<%6$,FH<+$N4JC12=$r9T$$$?$$>l9g$J$I$K$b(B
 $BMQ$$$k$3$H$,$G$-$k(B.  $BMQ$$$k$3$H$,$G$-$k(B.
   \E
   \BEG
   Function @code{rattoalgp()} takes as the second argument
   a list consisting of @b{root}'s that you want to convert,
   and converts them successively from the left.
   This example shows that apparent difference of the results due to
   the order of such conversion will vanish by simplification yielding
   the same result.
   Functions @code{algptorat()} and @code{rattoalgp()} can be conveniently
   used for your own simplification.
   \E
   
   \BJP
 @node $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B,,, $BBe?tE*?t$K4X$9$k1i;;(B  @node $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B,,, $BBe?tE*?t$K4X$9$k1i;;(B
 @section $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B  @section $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B
   \E
   \BEG
   @node Operations for uni-variate polynomials over an algebraic number field,,, Algebraic numbers
   @section Operations for uni-variate polynomials over an algebraic number field
   \E
   
 @noindent  @noindent
   \BJP
 @samp{sp} $B$G$O(B, 1 $BJQ?tB?9`<0$K8B$j(B, GCD, $B0x?tJ,2r$*$h$S$=$l$i$N1~MQ$H$7$F(B  @samp{sp} $B$G$O(B, 1 $BJQ?tB?9`<0$K8B$j(B, GCD, $B0x?tJ,2r$*$h$S$=$l$i$N1~MQ$H$7$F(B
 $B:G>.J,2rBN$r5a$a$kH!?t$rDs6!$7$F$$$k(B.  $B:G>.J,2rBN$r5a$a$kH!?t$rDs6!$7$F$$$k(B.
   \E
   \BEG
   In the file @samp{sp} are provided functions for uni-variate polynomial
   factorization and uni-variate polynomial GCD computation
   over algebraic numbers,
   and furthermore, as an application of them,
   functions to compute splitting fields of univariate polynomials.
   \E
   
 @menu  @menu
 * GCD::  * GCD::
   \BJP
 * $BL5J?J}J,2r(B $B0x?tJ,2r(B::  * $BL5J?J}J,2r(B $B0x?tJ,2r(B::
 * $B:G>.J,2rBN(B::  * $B:G>.J,2rBN(B::
   \E
   \BEG
   * Square-free factorization and Factorization::
   * Splitting fields::
   \E
 @end menu  @end menu
   
 @node GCD,,, $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B  \JP @node GCD,,, $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B
   \EG @node GCD,,, Operations for uni-variate polynomials over an algebraic number field
 @subsection GCD  @subsection GCD
   
 @noindent  @noindent
 $BBe?tBN>e$G$N(B GCD $B$O(B @code{gcda()} $B$K$h$j7W;;$5$l$k(B.  \BJP
   $BBe?tBN>e$G$N(B GCD $B$O(B @code{cr_gcda()} $B$K$h$j7W;;$5$l$k(B.
 $B$3$NH!?t$O%b%8%e%i1i;;$*$h$SCf9q>jM>DjM}$K$h$jBe?tBN>e$N(B GCD $B$r(B  $B$3$NH!?t$O%b%8%e%i1i;;$*$h$SCf9q>jM>DjM}$K$h$jBe?tBN>e$N(B GCD $B$r(B
 $B7W;;$9$k$b$N$G(B, $BC`<!3HBg$KBP$7$F$bM-8z$G$"$k(B.  $B7W;;$9$k$b$N$G(B, $BC`<!3HBg$KBP$7$F$bM-8z$G$"$k(B.
   \E
   \BEG
   Greatest common divisors (GCD) over algebraic number fields are computed
   by @code{cr_gcda()} function. This function computes GCD by using modular
   computation and Chinese remainder theorem and it works for the case
   where the ground field is a multiple extension.
   \E
   
 @example  @example
 [63] A=newalg(t^9-15*t^6-87*t^3-125);  [63] A=newalg(t^9-15*t^6-87*t^3-125);
Line 258  t#1^2+t#0*t#1+2*t#0
Line 502  t#1^2+t#0*t#1+2*t#0
 [65] P1=75*x^2+(150*B+10*A^7-175*A^4-395*A)*x+(75*B^2+(10*A^7-175*A^4-395*A)*B  [65] P1=75*x^2+(150*B+10*A^7-175*A^4-395*A)*x+(75*B^2+(10*A^7-175*A^4-395*A)*B
 +13*A^8-220*A^5-581*A^2)$  +13*A^8-220*A^5-581*A^2)$
 [66] P2=x^2+A*x+A^2$  [66] P2=x^2+A*x+A^2$
 [67] gcda(P1,P2,[B,A]);  [67] cr_gcda(P1,P2);
 27*x+((#0^6-19*#0^3-65)*#1-#0^7+19*#0^4+38*#0)  27*x+((#0^6-19*#0^3-65)*#1-#0^7+19*#0^4+38*#0)
 @end example  @end example
   
   \BJP
 @node $BL5J?J}J,2r(B $B0x?tJ,2r(B,,, $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B  @node $BL5J?J}J,2r(B $B0x?tJ,2r(B,,, $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B
 @subsection $BL5J?J}J,2r(B, $B0x?tJ,2r(B  @subsection $BL5J?J}J,2r(B, $B0x?tJ,2r(B
   \E
   \BEG
   @node Square-free factorization and Factorization,,, Operations for uni-variate polynomials over an algebraic number field
   @subsection Square-free factorization and Factorization
   \E
   
 @noindent  @noindent
   \BJP
 $BL5J?J}J,2r$O(B, $BB?9`<0$H$=$NHyJ,$H$N(B GCD $B$N7W;;$+$i;O$^$k$b$C$H$b0lHLE*$J(B  $BL5J?J}J,2r$O(B, $BB?9`<0$H$=$NHyJ,$H$N(B GCD $B$N7W;;$+$i;O$^$k$b$C$H$b0lHLE*$J(B
 $B%"%k%4%j%:%`$r:NMQ$7$F$$$k(B. $BH!?t$O(B @code{asq()} $B$G$"$k(B.  $B%"%k%4%j%:%`$r:NMQ$7$F$$$k(B. $BH!?t$O(B @code{asq()} $B$G$"$k(B.
   \E
   \BEG
   For square-free factorization (of uni-variate polynomials over algebraic
   number fields), we employ the most fundamental algorithm which begins
   first to compute GCD of a polynomial and its derivative.
   The function to do this factorization is @code{asq()}.
   \E
   
 @example  @example
 [116] A=newalg(x^2+x+1);  [116] A=newalg(x^2+x+1);
Line 281  x^11+(#4+1)*x^10+(-4*#4-8)*x^9+(-10*#4-4)*x^8+(16*#4+2
Line 539  x^11+(#4+1)*x^10+(-4*#4-8)*x^9+(-10*#4-4)*x^8+(16*#4+2
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 $B7k2L$ODL>o$HF1MM$K(B, [@b{$B0x;R(B}, @b{$B=EJ#EY(B}] $B$N%j%9%H$H$J$k$,(B, $BA4$F$N0x;R(B  $B7k2L$ODL>o$HF1MM$K(B, [@b{$B0x;R(B}, @b{$B=EJ#EY(B}] $B$N%j%9%H$H$J$k$,(B, $BA4$F$N0x;R(B
 $B$N@Q$O(B, $B$b$H$NB?9`<0$HDj?tG\$N:9$O$"$jF@$k(B. $B$3$l$O(B, $B0x;R$r@0?t78?t$K$7(B  $B$N@Q$O(B, $B$b$H$NB?9`<0$HDj?tG\$N:9$O$"$jF@$k(B. $B$3$l$O(B, $B0x;R$r@0?t78?t$K$7(B
 $B$F8+$d$9$/$9$k$?$a$G(B, $B0x?tJ,2r$G$bF1MM$G$"$k(B.  $B$F8+$d$9$/$9$k$?$a$G(B, $B0x?tJ,2r$G$bF1MM$G$"$k(B.
   \E
   \BEG
   Like factorization over the rational number field,
   the result is presented,
   commonly to both square-free factorization and factorization,
   as a list whose elements are pairs (list of two elements) in the form
    [@b{factor}, @b{multiplicity}]
   without the constant multiple part.
   
   Here, it should be noticed that the products of all factors of the
   result may DIFFER from the input polynomial by a constant.
   The reason is that the factors are normalized so that they have
   integral leading coefficients for the sake of readability.
   
   This incongruity may happen to square-free factorization and
   factorization commonly.
   \E
   
 @noindent  @noindent
   \BJP
 $BBe?tBN>e$G$N0x?tJ,2r$O(B, Trager $B$K$h$k%N%k%`K!$r2~NI$7$?$b$N$G(B, $BFC$K(B  $BBe?tBN>e$G$N0x?tJ,2r$O(B, Trager $B$K$h$k%N%k%`K!$r2~NI$7$?$b$N$G(B, $BFC$K(B
 $B$"$kB?9`<0$KBP$7(B, $B$=$N:,$rE:2C$7$?BN>e$G$=$NB?9`<0<+?H$r0x?tJ,2r$9$k(B  $B$"$kB?9`<0$KBP$7(B, $B$=$N:,$rE:2C$7$?BN>e$G$=$NB?9`<0<+?H$r0x?tJ,2r$9$k(B
 $B>l9g$KFC$KM-8z$G$"$k(B.  $B>l9g$KFC$KM-8z$G$"$k(B.
   \E
   \BEG
   The algorithm employed for factorization over algebraic number fields
   is an improvement of the norm method by Trager.
   It is especially very effective to factorize a polynomial over a field
   obtained by adjoining some of its @b{root}'s to the base field.
   \E
   
 @example  @example
 [119] af(T,[A]);  [119] af(T,[A]);
Line 296  x^11+(#4+1)*x^10+(-4*#4-8)*x^9+(-10*#4-4)*x^8+(16*#4+2
Line 580  x^11+(#4+1)*x^10+(-4*#4-8)*x^9+(-10*#4-4)*x^8+(16*#4+2
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 $B0z?t$O(B 2 $B$D$G(B, $BBh(B 2 $B0z?t$O(B, @code{root} $B$N%j%9%H$G$"$k(B. $B0x?tJ,2r$O(B  $B0z?t$O(B 2 $B$D$G(B, $BBh(B 2 $B0z?t$O(B, @code{root} $B$N%j%9%H$G$"$k(B. $B0x?tJ,2r$O(B
 $BM-M}?tBN$K(B, $B$=$l$i$N(B @code{root} $B$rE:2C$7$?BN>e$G9T$o$l$k(B.  $BM-M}?tBN$K(B, $B$=$l$i$N(B @code{root} $B$rE:2C$7$?BN>e$G9T$o$l$k(B.
 @code{root} $B$N=g=x$K$O@)8B$,$"$k(B. $B$9$J$o$A(B, $B8e$GDj5A$5$l$?$b$N$[$I(B  @code{root} $B$N=g=x$K$O@)8B$,$"$k(B. $B$9$J$o$A(B, $B8e$GDj5A$5$l$?$b$N$[$I(B
 $BA0$NJ}$K$3$J$1$l$P(B  $BA0$NJ}$K$3$J$1$l$P(B
 $B$J$i$J$$(B. $BJB$Y49$($O(B, $B<+F0E*$K$O9T$o$l$J$$(B. $B%f!<%6$N@UG$$H$J$k(B.  $B$J$i$J$$(B. $BJB$Y49$($O(B, $B<+F0E*$K$O9T$o$l$J$$(B. $B%f!<%6$N@UG$$H$J$k(B.
   \E
   \BEG
   The function takes two arguments: The second argument is a list of
   @b{root}'s.  Factorization is performed over a field obtained by
   adjoining the @b{root}'s to the rational number field.
   It is important to keep in mind that the ordering of the @b{root}'s
   must obey a restriction: Last defined should come first.
   The automatic re-ordering is not done.
   It should be done by yourself.
   \E
   
 @noindent  @noindent
   \BJP
 $B%N%k%`$rMQ$$$?0x?tJ,2r$K$*$$$F$O(B, $B%N%k%`$N7W;;$H@0?t78?t(B 1 $BJQ?tB?9`<0$N(B  $B%N%k%`$rMQ$$$?0x?tJ,2r$K$*$$$F$O(B, $B%N%k%`$N7W;;$H@0?t78?t(B 1 $BJQ?tB?9`<0$N(B
 $B0x?tJ,2r$N8zN($,(B, $BA4BN$N8zN($r:81&$9$k(B. $B$3$N$&$A(B, $BFC$K9b<!$NB?9`<0(B  $B0x?tJ,2r$N8zN($,(B, $BA4BN$N8zN($r:81&$9$k(B. $B$3$N$&$A(B, $BFC$K9b<!$NB?9`<0(B
 $B$N>l9g$K8e<T$K$*$$$FAH9g$;GzH/$K$h$j7W;;ITG=$K$J$k>l9g$,$7$P$7$P@8$:$k(B.  $B$N>l9g$K8e<T$K$*$$$FAH9g$;GzH/$K$h$j7W;;ITG=$K$J$k>l9g$,$7$P$7$P@8$:$k(B.
   \E
   \BEG
   The efficiency of factorization via norm depends on the efficiency
   of the norm computation and univariate factorization over the rationals.
   Especially the latter often causes combinatorial explosion and the
   computation will stick in such a case.
   \E
   
 @example  @example
 [120] B=newalg(x^2-2*A-3);  [120] B=newalg(x^2-2*A-3);
Line 314  x^11+(#4+1)*x^10+(-4*#4-8)*x^9+(-10*#4-4)*x^8+(16*#4+2
Line 617  x^11+(#4+1)*x^10+(-4*#4-8)*x^9+(-10*#4-4)*x^8+(16*#4+2
 [[x+(#5),2],[x^3-x+(-#4),2],[x+(-#5),2],[x+(#4+1),1]]  [[x+(#5),2],[x^3-x+(-#4),2],[x+(-#5),2],[x+(#4+1),1]]
 @end example  @end example
   
   \BJP
 @node $B:G>.J,2rBN(B,,, $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B  @node $B:G>.J,2rBN(B,,, $BBe?tBN>e$G$N(B 1 $BJQ?tB?9`<0$N1i;;(B
 @subsection $B:G>.J,2rBN(B  @subsection $B:G>.J,2rBN(B
   \E
   \BEG
   @node Splitting fields,,, Operations for uni-variate polynomials over an algebraic number field
   @subsection Splitting fields
   \E
   
 @noindent  @noindent
   \BJP
 $B$d$dFC<l$J1i;;$G$O$"$k$,(B, $BA0@a$N0x?tJ,2r$rH?I|E,MQ$9$k$3$H$K$h$j(B,  $B$d$dFC<l$J1i;;$G$O$"$k$,(B, $BA0@a$N0x?tJ,2r$rH?I|E,MQ$9$k$3$H$K$h$j(B,
 $BB?9`<0$N:G>.J,2rBN$r5a$a$k$3$H$,$G$-$k(B. $BH!?t$O(B @code{sp()} $B$G$"$k(B.  $BB?9`<0$N:G>.J,2rBN$r5a$a$k$3$H$,$G$-$k(B. $BH!?t$O(B @code{sp()} $B$G$"$k(B.
   \E
   \BEG
   This operation may be somewhat unusual and for specific interest.
   (Galois Group for example.)  Procedurally, however, it is easy to
   obtain the splitting field of a polynomial by repeated application
   of algebraic factorization described in the previous section.
   The function is @code{sp()}.
   \E
   
 @example  @example
 [103] sp(x^5-2);  [103] sp(x^5-2);
Line 329  x^11+(#4+1)*x^10+(-4*#4-8)*x^9+(-10*#4-4)*x^8+(16*#4+2
Line 647  x^11+(#4+1)*x^10+(-4*#4-8)*x^9+(-10*#4-4)*x^8+(16*#4+2
 @end example  @end example
   
 @noindent  @noindent
   \BJP
 @code{sp()} $B$O(B 1 $B0z?t$G(B, $B7k2L$O(B @code{[1 $B<!0x;R$N%j%9%H(B, [[root,  @code{sp()} $B$O(B 1 $B0z?t$G(B, $B7k2L$O(B @code{[1 $B<!0x;R$N%j%9%H(B, [[root,
 algptorat($BDj5AB?9`<0(B)] $B$N%j%9%H(B]} $B$J$k%j%9%H$G$"$k(B.  algptorat($BDj5AB?9`<0(B)] $B$N%j%9%H(B]} $B$J$k%j%9%H$G$"$k(B.
 $BBh(B 2 $BMWAG$N(B @code{[root,algptorat($BDj5AB?9`<0(B)]} $B$N%j%9%H$O(B,  $BBh(B 2 $BMWAG$N(B @code{[root,algptorat($BDj5AB?9`<0(B)]} $B$N%j%9%H$O(B,
 $B1&$+$i=g$K(B, $B:G>.J,2rBN$,F@$i$l$k$^$GE:2C$7$F$$$C$?(B @code{root} $B$r<($9(B.  $B1&$+$i=g$K(B, $B:G>.J,2rBN$,F@$i$l$k$^$GE:2C$7$F$$$C$?(B @code{root} $B$r<($9(B.
 $B$=$NDj5AB?9`<0$O(B, $B$=$ND>A0$^$G$N(B @code{root} $B$rE:2C$7$?BN>e$G4{Ls$G$"$k$3$H(B  $B$=$NDj5AB?9`<0$O(B, $B$=$ND>A0$^$G$N(B @code{root} $B$rE:2C$7$?BN>e$G4{Ls$G$"$k$3$H(B
 $B$,J]>Z$5$l$F$$$k(B.  $B$,J]>Z$5$l$F$$$k(B.
   \E
   \BEG
   Function @code{sp()} takes only one argument.
   The result is a list of two element: The first element is
   a list of linear factors, and the second one is a list whose elements
   are pairs (list of two elements) in the form
   @code{[@b{root}, algptorat(@b{defining polynomial})]}.
   The second element, a list of pairs of form
   @code{[@b{root},algptorat(@b{defining polynomial})]},
   corresponds to the @b{root}'s which are adjoined to eventually obtain
   the splitting field.  They are listed in the reverse order of adjoining.
   Each of the defining polynomials in the list is, of course,
   guaranteed to be irreducible over the field obtained by adjoining all
   @b{root}'s defined before it.
   \E
   
 @noindent  @noindent
   \BJP
 $B7k2L$NBh(B 1 $BMWAG$G$"$k(B 1 $B<!0x;R$N%j%9%H$O(B, $BBh(B 2 $BMWAG$N(B @code{root} $B$rA4$F(B  $B7k2L$NBh(B 1 $BMWAG$G$"$k(B 1 $B<!0x;R$N%j%9%H$O(B, $BBh(B 2 $BMWAG$N(B @code{root} $B$rA4$F(B
 $BE:2C$7$?BN>e$G$N(B, @code{sp()} $B$N0z?t$NB?9`<0$NA4$F$N0x;R$rI=$9(B. $B$=$NBN$O(B  $BE:2C$7$?BN>e$G$N(B, @code{sp()} $B$N0z?t$NB?9`<0$NA4$F$N0x;R$rI=$9(B. $B$=$NBN$O(B
 $B:G>.J,2rBN$H$J$C$F$$$k$N$G(B, $B0x;R$OA4$F(B 1 $B<!$H$J$k$o$1$G$"$k(B. @code{af()}  $B:G>.J,2rBN$H$J$C$F$$$k$N$G(B, $B0x;R$OA4$F(B 1 $B<!$H$J$k$o$1$G$"$k(B. @code{af()}
 $B$HF1MM(B, $BA4$F$N0x;R$N@Q$O(B, $B$b$H$NB?9`<0$HDj?tG\$N:9$O$"$jF@$k(B.  $B$HF1MM(B, $BA4$F$N0x;R$N@Q$O(B, $B$b$H$NB?9`<0$HDj?tG\$N:9$O$"$jF@$k(B.
   \E
   \BEG
   The first element of the result, a list of linear factors, contains
   all irreducible factors of the input polynomial over the field
   obtained by adjoining all @b{root}'s in the second element of the result.
   Because such field is the splitting field of the input polynomial,
   factors in the result are all linear as the consequence.
   
   Similarly to function @code{af()}, the product of all resulting factors
   may yield a polynomial which differs by a constant.
   \E
   
   \BJP
 @node $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B,,, $BBe?tE*?t$K4X$9$k1i;;(B  @node $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B,,, $BBe?tE*?t$K4X$9$k1i;;(B
 @section $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  @section $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
   \E
   \BEG
   @node Summary of functions for algebraic numbers,,, Algebraic numbers
   @section Summary of functions for algebraic numbers
   \E
 @menu  @menu
 * newalg::  * newalg::
 * defpoly::  * defpoly::
Line 354  algptorat($BDj5AB?9`<0(B)] $B$N%j%9%H(B]} $B$J$k%
Line 704  algptorat($BDj5AB?9`<0(B)] $B$N%j%9%H(B]} $B$J$k%
 * simpalg::  * simpalg::
 * algptorat::  * algptorat::
 * rattoalgp::  * rattoalgp::
 * gcda::  * cr_gcda::
 * sp_norm::  * sp_norm::
 * asq af::  * asq af af_noalg::
 * sp::  * sp sp_noalg::
 @end menu  @end menu
   
 @node newalg,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node newalg,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
   \EG @node newalg,,, Summary of functions for algebraic numbers
 @subsection @code{newalg}  @subsection @code{newalg}
 @findex newalg  @findex newalg
   
 @table @t  @table @t
 @item newalg(@var{defpoly})  @item newalg(@var{defpoly})
 :: @code{root} $B$r@8@.$9$k(B.  \JP :: @code{root} $B$r@8@.$9$k(B.
   \EG :: Creates a new @b{root}.
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $BBe?tE*?t(B (@code{root})  \JP $BBe?tE*?t(B (@code{root})
   \EG algebraic number (@b{root})
 @item defpoly  @item defpoly
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 @var{defpoly} $B$rDj5AB?9`<0$H$9$kBe?tE*?t(B (@code{root}) $B$r@8@.$9$k(B.  \JP @var{defpoly} $B$rDj5AB?9`<0$H$9$kBe?tE*?t(B (@code{root}) $B$r@8@.$9$k(B.
   \BEG
   Creates a new @b{root} (algebraic number) with its defining
   polynomial @var{defpoly}.
   \E
 @item  @item
 @var{defpoly} $B$KBP$9$k@)8B$K4X$7$F$O(B, @xref{$BBe?tE*?t$NI=8=(B}.  \JP @var{defpoly} $B$KBP$9$k@)8B$K4X$7$F$O(B, @xref{$BBe?tE*?t$NI=8=(B}.
   \BEG
   For constraints on @var{defpoly},
   @xref{Representation of algebraic numbers}.
   \E
 @end itemize  @end itemize
   
 @example  @example
Line 389  algptorat($BDj5AB?9`<0(B)] $B$N%j%9%H(B]} $B$J$k%
Line 751  algptorat($BDj5AB?9`<0(B)] $B$N%j%9%H(B]} $B$J$k%
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
   \EG @item Reference
 @fref{defpoly}  @fref{defpoly}
 @end table  @end table
   
 @node defpoly,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node defpoly,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
   \EG @node defpoly,,, Summary of functions for algebraic numbers
 @subsection @code{defpoly}  @subsection @code{defpoly}
 @findex defpoly  @findex defpoly
   
 @table @t  @table @t
 @item defpoly(@var{alg})  @item defpoly(@var{alg})
 :: @code{root} $B$NDj5AB?9`<0$rJV$9(B.  \JP :: @code{root} $B$NDj5AB?9`<0$rJV$9(B.
   \EG :: Returns the defining polynomial of @b{root} @var{alg}.
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @item alg  @item alg
 $BBe?tE*?t(B (@code{root})  \JP $BBe?tE*?t(B (@code{root})
   \EG algebraic number (@code{root})
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 @code{root} @var{alg} $B$NDj5AB?9`<0$rJV$9(B.  \JP @code{root} @var{alg} $B$NDj5AB?9`<0$rJV$9(B.
   \EG Returns the defining polynomial of @b{root} @var{alg}.
 @item  @item
   \BJP
 @code{root} $B$r(B @code{#@var{n}} $B$H$9$l$P(B, $BDj5AB?9`<0$N<gJQ?t$O(B  @code{root} $B$r(B @code{#@var{n}} $B$H$9$l$P(B, $BDj5AB?9`<0$N<gJQ?t$O(B
 @code{t#@var{n}} $B$H$J$k(B.  @code{t#@var{n}} $B$H$J$k(B.
   \E
   \BEG
   If the argument @var{alg}, a @b{root}, is @code{#@var{n}},
   then the main variable of its defining polynomial is
   @code{t#@var{n}}.
   \E
 @end itemize  @end itemize
   
 @example  @example
Line 423  t#0^2-2
Line 798  t#0^2-2
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
   \EG @item Reference
 @fref{newalg}, @fref{alg}, @fref{algv}  @fref{newalg}, @fref{alg}, @fref{algv}
 @end table  @end table
   
 @node alg,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node alg,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
   \EG @node alg,,, Summary of functions for algebraic numbers
 @subsection @code{alg}  @subsection @code{alg}
 @findex alg  @findex alg
   
 @table @t  @table @t
 @item alg(@var{i})  @item alg(@var{i})
 :: $B%$%s%G%C%/%9$KBP1~$9$k(B @code{root} $B$rJV$9(B.  \JP :: $B%$%s%G%C%/%9$KBP1~$9$k(B @code{root} $B$rJV$9(B.
   \EG :: Returns a @b{root} which correspond to the index @var{i}.
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $BBe?tE*?t(B (@code{root})  \JP $BBe?tE*?t(B (@code{root})
   \EG algebraic number (@code{root})
 @item i  @item i
 $B@0?t(B  \JP $B@0?t(B
   \EG integer
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 @code{root} @code{#@var{i}} $B$rJV$9(B.  \JP @code{root} @code{#@var{i}} $B$rJV$9(B.
   \EG Returns @code{#@var{i}}, a @b{root}.
 @item  @item
   \BJP
 @code{#@var{i}} $B$O%f!<%6$,D>@\F~NO$G$-$J$$$?$a(B, @code{alg(@var{i})} $B$H(B  @code{#@var{i}} $B$O%f!<%6$,D>@\F~NO$G$-$J$$$?$a(B, @code{alg(@var{i})} $B$H(B
 $B$$$&7A$GF~NO$9$k(B.  $B$$$&7A$GF~NO$9$k(B.
   \E
   \BEG
   Because @code{#@var{i}} cannot be input directly,
   this function provides an alternative way: input @code{alg(@var{i})}.
   \E
 @end itemize  @end itemize
   
 @example  @example
Line 460  syntax error
Line 847  syntax error
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
   \EG @item Reference
 @fref{newalg}, @fref{algv}  @fref{newalg}, @fref{algv}
 @end table  @end table
   
 @node algv,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node algv,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
   \EG @node algv,,, Summary of functions for algebraic numbers
 @subsection @code{algv}  @subsection @code{algv}
 @findex algv  @findex algv
   
 @table @t  @table @t
 @item algv(@var{i})  @item algv(@var{i})
 :: @code{alg(@var{i})} $B$KBP1~$9$kITDj85$rJV$9(B.  \JP :: @code{alg(@var{i})} $B$KBP1~$9$kITDj85$rJV$9(B.
   \EG :: Returns the associated indeterminate with @code{alg(@var{i})}.
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @item i  @item i
 $B@0?t(B  \JP $B@0?t(B
   \EG integer
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 $BB?9`<0(B @code{t#@var{i}} $B$rJV$9(B.  \JP $BB?9`<0(B @code{t#@var{i}} $B$rJV$9(B.
   \EG Returns an indeterminate @code{t#@var{i}}
 @item  @item
   \BJP
 @code{t#@var{i}} $B$O%f!<%6$,D>@\F~NO$G$-$J$$$?$a(B, @code{algv(@var{i})} $B$H(B  @code{t#@var{i}} $B$O%f!<%6$,D>@\F~NO$G$-$J$$$?$a(B, @code{algv(@var{i})} $B$H(B
 $B$$$&7A$GF~NO$9$k(B.  $B$$$&7A$GF~NO$9$k(B.
   \E
   \BEG
   Since indeterminate @code{t#@var{i}} cannot be input directly,
   it is input by @code{algv(@var{i})}.
   \E
 @end itemize  @end itemize
   
 @example  @example
Line 499  t#0
Line 898  t#0
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
   \EG @item Reference
 @fref{newalg}, @fref{defpoly}, @fref{alg}  @fref{newalg}, @fref{defpoly}, @fref{alg}
 @end table  @end table
   
 @node simpalg,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node simpalg,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
   \EG @node simpalg,,, Summary of functions for algebraic numbers
 @subsection @code{simpalg}  @subsection @code{simpalg}
 @findex simpalg  @findex simpalg
   
 @table @t  @table @t
 @item simpalg(@var{rat})  @item simpalg(@var{rat})
 :: $BM-M}<0$K4^$^$l$kBe?tE*?t$r4JC12=$9$k(B.  \JP :: $BM-M}<0$K4^$^$l$kBe?tE*?t$r4JC12=$9$k(B.
   \EG :: Simplifies algebraic numbers in a rational expression.
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $BM-M}<0(B  \JP $BM-M}<0(B
   \EG rational expression
 @item rat  @item rat
 $BM-M}<0(B  \JP $BM-M}<0(B
   \EG rational expression
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 @samp{sp} $B$GDj5A$5$l$F$$$k(B.  \JP @samp{sp} $B$GDj5A$5$l$F$$$k(B.
   \EG Defined in the file @samp{sp}.
 @item  @item
   \BJP
 $B?t(B, $BB?9`<0(B, $BM-M}<0$K4^$^$l$kBe?tE*?t$r(B, $B4^$^$l$k(B @code{root} $B$NDj5A(B  $B?t(B, $BB?9`<0(B, $BM-M}<0$K4^$^$l$kBe?tE*?t$r(B, $B4^$^$l$k(B @code{root} $B$NDj5A(B
 $BB?9`<0$K$h$j4JC12=$9$k(B.  $BB?9`<0$K$h$j4JC12=$9$k(B.
   \E
   \BEG
   Simplifies algebraic numbers contained in numbers,
   polynomials, and rational expressions by the defining
   polynomials of @b{root}'s contained in them.
   \E
 @item  @item
 $B?t$N>l9g(B, $BJ,Jl$,$"$l$PM-M}2=$5$l(B, $B7k2L$O(B @code{root} $B$NB?9`<0$H$J$k(B.  \JP $B?t$N>l9g(B, $BJ,Jl$,$"$l$PM-M}2=$5$l(B, $B7k2L$O(B @code{root} $B$NB?9`<0$H$J$k(B.
   \BEG
   If the argument is a number having the denominator, it is
   rationalized and the result is a polynomial in @b{root}'s.
   \E
 @item  @item
 $BB?9`<0$N>l9g(B, $B3F78?t$,4JC12=$5$l$k(B.  \JP $BB?9`<0$N>l9g(B, $B3F78?t$,4JC12=$5$l$k(B.
   \EG If the argument is a polynomial, each coefficient is simplified.
 @item  @item
 $BM-M}<0$N>l9g(B, $BJ,JlJ,;R$,B?9`<0$H$7$F4JC12=$5$l$k(B.  \JP $BM-M}<0$N>l9g(B, $BJ,JlJ,;R$,B?9`<0$H$7$F4JC12=$5$l$k(B.
   \BEG
   If the argument is a rational expression, its denominator and
   numerator are simplified as a polynomial.
   \E
 @end itemize  @end itemize
   
 @example  @example
Line 546  return to toplevel
Line 967  return to toplevel
 (x+(#0+1))/(x+(-#0+1))  (x+(#0+1))/(x+(-#0+1))
 @end example  @end example
   
 @node algptorat,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node algptorat,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
   \EG @node algptorat,,, Summary of functions for algebraic numbers
 @subsection @code{algptorat}  @subsection @code{algptorat}
 @findex algptorat  @findex algptorat
   
 @table @t  @table @t
 @item algptorat(@var{poly})  @item algptorat(@var{poly})
 :: $BB?9`<0$K4^$^$l$k(B @code{root} $B$r(B, $BBP1~$9$kITDj85$KCV$-49$($k(B.  \JP :: $BB?9`<0$K4^$^$l$k(B @code{root} $B$r(B, $BBP1~$9$kITDj85$KCV$-49$($k(B.
   \EG :: Substitutes the associated indeterminate for every @b{root}
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @item poly  @item poly
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 @samp{sp} $B$GDj5A$5$l$F$$$k(B.  \JP @samp{sp} $B$GDj5A$5$l$F$$$k(B.
   \EG Defined in the file @samp{sp}.
 @item  @item
   \BJP
 $BB?9`<0$K4^$^$l$k(B @code{root} @code{#@var{n}} $B$rA4$F(B @code{t#@var{n}} $B$K(B  $BB?9`<0$K4^$^$l$k(B @code{root} @code{#@var{n}} $B$rA4$F(B @code{t#@var{n}} $B$K(B
 $BCV$-49$($k(B.  $BCV$-49$($k(B.
   \E
   \BEG
   Substitutes the associated indeterminate @code{t#@var{n}}
   for every @b{root} @code{#@var{n}} in a polynomial.
   \E
 @end itemize  @end itemize
   
 @example  @example
Line 576  return to toplevel
Line 1008  return to toplevel
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
   \EG @item Reference
 @fref{defpoly}, @fref{algv}  @fref{defpoly}, @fref{algv}
 @end table  @end table
   
 @node rattoalgp,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node rattoalgp,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
   \EG @node rattoalgp,,, Summary of functions for algebraic numbers
 @subsection @code{rattoalgp}  @subsection @code{rattoalgp}
 @findex rattoalgp  @findex rattoalgp
   
 @table @t  @table @t
 @item rattoalgp(@var{poly},@var{alglist})  @item rattoalgp(@var{poly},@var{alglist})
   \BJP
 :: $BB?9`<0$K4^$^$l$k(B @code{root} $B$KBP1~$9$kITDj85$r(B @code{root} $B$K(B  :: $BB?9`<0$K4^$^$l$k(B @code{root} $B$KBP1~$9$kITDj85$r(B @code{root} $B$K(B
 $BCV$-49$($k(B.  $BCV$-49$($k(B.
   \E
   \BEG
   :: Substitutes a @b{root} for the associated indeterminate with the
    @b{root}.
   \E
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @item poly  @item poly
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @item alglist  @item alglist
 $B%j%9%H(B  \JP $B%j%9%H(B
   \EG list
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 @samp{sp} $B$GDj5A$5$l$F$$$k(B.  \JP @samp{sp} $B$GDj5A$5$l$F$$$k(B.
   \EG Defined in the file @samp{sp}.
 @item  @item
   \BJP
 $BBh(B 2 $B0z?t$O(B @code{root} $B$N%j%9%H$G$"$k(B. @code{rattoalgp()} $B$O(B, $B$3$N(B @code{root}  $BBh(B 2 $B0z?t$O(B @code{root} $B$N%j%9%H$G$"$k(B. @code{rattoalgp()} $B$O(B, $B$3$N(B @code{root}
 $B$KBP1~$9$kITDj85$r(B, $B$=$l$>$l(B @code{root} $B$KCV$-49$($k(B.  $B$KBP1~$9$kITDj85$r(B, $B$=$l$>$l(B @code{root} $B$KCV$-49$($k(B.
   \E
   \BEG
   The second argument is a list of @b{root}'s. Function @code{rattoalgp()}
   substitutes a @b{root} for the associated indeterminate of the @b{root}.
   \E
 @end itemize  @end itemize
   
 @example  @example
Line 613  return to toplevel
Line 1063  return to toplevel
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
   \EG @item Reference
 @fref{alg}, @fref{algv}  @fref{alg}, @fref{algv}
 @end table  @end table
   
 @node gcda,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node cr_gcda,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
 @subsection @code{gcda}  \EG @node cr_gcda,,, Summary of functions for algebraic numbers
 @findex gcda  @subsection @code{cr_gcda}
   @findex cr_gcda
   
 @table @t  @table @t
 @item gcda(@var{poly1},@var{poly2},@var{alist})  @item cr_gcda(@var{poly1},@var{poly2})
 :: $BBe?tBN>e$N(B 1 $BJQ?tB?9`<0$N(B GCD  \JP :: $BBe?tBN>e$N(B 1 $BJQ?tB?9`<0$N(B GCD
   \EG :: GCD of two uni-variate polynomials over an algebraic number field.
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @item poly1, poly2  @item poly1, poly2
 $BB?9`<0(B  \JP $BB?9`<0(B
 @item alist  \EG polynomial
 $B%j%9%H(B  
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 @samp{sp} $B$GDj5A$5$l$F$$$k(B.  \JP @samp{sp} $B$GDj5A$5$l$F$$$k(B.
   \EG Defined in the file @samp{sp}.
 @item  @item
 2 $B$D$N(B 1 $BJQ?tB?9`<0$N(B GCD $B$r5a$a$k(B.  \JP 2 $B$D$N(B 1 $BJQ?tB?9`<0$N(B GCD $B$r5a$a$k(B.
 @item  \EG Finds the GCD of two uni-variate polynomials.
 @var{alist} $B$OF~NO$K8=$l$k(B @code{root} $B$*$h$S(B, $B$=$l$i$NDj5A$K4^$^$l$k(B  
 @code{root} $B$r:F5"E*$K<h$j=P$7$FJB$Y$?%j%9%H(B. @var{a} $B$,(B @var{b} $B$N(B  
 $BDj5A$K4^$^$l$F$$$k>l9g(B, @var{a} $B$O(B @var{b} $B$h$j8e(B ($B1&(B) $B$KJB$P$J$1$l$P(B  
 $B$J$i$J$$(B.  
 @end itemize  @end itemize
   
 @example  @example
Line 652  return to toplevel
Line 1102  return to toplevel
 [77] Y=x^6+6*x^5+24*x^4+8*x^3-48*x^2+384*x+1024$  [77] Y=x^6+6*x^5+24*x^4+8*x^3-48*x^2+384*x+1024$
 [78] A=newalg(X);  [78] A=newalg(X);
 (#0)  (#0)
 [79] gcda(X,subst(Y,x,x+A),[A]);  [79] cr_gcda(X,subst(Y,x,x+A));
 x+(-#0)  x+(-#0)
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
 @fref{gr hgr gr_mod}, @fref{asq af}  \EG @item Reference
   @fref{gr hgr gr_mod}, @fref{asq af af_noalg}
 @end table  @end table
   
 @node sp_norm,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node sp_norm,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
   \EG @node sp_norm,,, Summary of functions for algebraic numbers
 @subsection @code{sp_norm}  @subsection @code{sp_norm}
 @findex sp_norm  @findex sp_norm
   
 @table @t  @table @t
 @item sp_norm(@var{alg},@var{var},@var{poly},@var{alglist})  @item sp_norm(@var{alg},@var{var},@var{poly},@var{alglist})
 :: $BBe?tBN>e$G$N%N%k%`$N7W;;(B  \JP :: $BBe?tBN>e$G$N%N%k%`$N7W;;(B
   \EG :: Norm computation over an algebraic number field.
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @item var  @item var
 @var{poly} $B$N<gJQ?t(B  \JP @var{poly} $B$N<gJQ?t(B
   \EG The main variable of @var{poly}
 @item poly  @item poly
 1 $BJQ?tB?9`<0(B  \JP 1 $BJQ?tB?9`<0(B
   \EG univariate polynomial
 @item alg  @item alg
 @code{root}  @code{root}
 @item alglist  @item alglist
 @code{root} $B$N%j%9%H(B  \JP @code{root} $B$N%j%9%H(B
   \EG @code{root} list
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 @samp{sp} $B$GDj5A$5$l$F$$$k(B.  \JP @samp{sp} $B$GDj5A$5$l$F$$$k(B.
   \EG Defined in the file @samp{sp}.
 @item  @item
   \BJP
 @var{poly} $B$N(B, @var{alg} $B$K4X$9$k%N%k%`$r$H$k(B. $B$9$J$o$A(B,  @var{poly} $B$N(B, @var{alg} $B$K4X$9$k%N%k%`$r$H$k(B. $B$9$J$o$A(B,
 @b{K} = @b{Q}(@var{alglist} \ @{@var{alg}@}) $B$H$9$k$H$-(B,  @b{K} = @b{Q}(@var{alglist} \ @{@var{alg}@}) $B$H$9$k$H$-(B,
 @var{poly} $B$K8=$l$k(B @var{alg} $B$r(B, @var{alg} $B$N(B @b{K} $B>e$N6&Lr$KCV$-49$($?$b$N(B  @var{poly} $B$K8=$l$k(B @var{alg} $B$r(B, @var{alg} $B$N(B @b{K} $B>e$N6&Lr$KCV$-49$($?$b$N(B
 $BA4$F$N@Q$rJV$9(B.  $BA4$F$N@Q$rJV$9(B.
   \E
   \BEG
   Computes the norm of @var{poly} with respect to @var{alg}.
   Namely, if we write
   @b{K} = @b{Q}(@var{alglist} \ @{@var{alg}@}),
   The function returns a product of all conjugates of @var{poly},
   where the conjugate of polynomial @var{poly} is a polynomial
   in which the algebraic number @var{alg} is substituted
   for its conjugate over @b{K}.
   \E
 @item  @item
 $B7k2L$O(B @b{K} $B>e$NB?9`<0$H$J$k(B.  \JP $B7k2L$O(B @b{K} $B>e$NB?9`<0$H$J$k(B.
   \EG The result is a polynomial over @b{K}.
 @item  @item
   \BJP
 $B<B:]$K$OF~NO$K$h$j>l9g$o$1$,9T$o$l(B, $B=*7k<0$ND>@\7W;;$dCf9q>jM>DjM}$K(B  $B<B:]$K$OF~NO$K$h$j>l9g$o$1$,9T$o$l(B, $B=*7k<0$ND>@\7W;;$dCf9q>jM>DjM}$K(B
 $B$h$j7W;;$5$l$k$,(B, $B:GE,$JA*Br$,9T$o$l$F$$$k$H$O8B$i$J$$(B.  $B$h$j7W;;$5$l$k$,(B, $B:GE,$JA*Br$,9T$o$l$F$$$k$H$O8B$i$J$$(B.
 $BBg0hJQ?t(B @code{USE_RES} $B$r(B 1 $B$K@_Dj$9$k$3$H$K$h$j(B, $B>o$K=*7k<0$K$h$j7W;;(B  $BBg0hJQ?t(B @code{USE_RES} $B$r(B 1 $B$K@_Dj$9$k$3$H$K$h$j(B, $B>o$K=*7k<0$K$h$j7W;;(B
 $B$5$;$k$3$H$,$G$-$k(B.  $B$5$;$k$3$H$,$G$-$k(B.
   \E
   \BEG
   The method of computation depends on the input. Currently
   direct computation of resultant and Chinese remainder theorem
   are used but the selection is not necessarily optimal.
   By setting the global variable @code{USE_RES} to 1, the builtin function
   @code{res()} is always used.
   \E
 @end itemize  @end itemize
   
 @example  @example
Line 711  x^12+2*x^8+5*x^4+1
Line 1190  x^12+2*x^8+5*x^4+1
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
 @fref{res}, @fref{asq af}  \EG @item Reference
   @fref{res}, @fref{asq af af_noalg}
 @end table  @end table
   
 @node asq af,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node asq af af_noalg,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
 @subsection @code{asq}, @code{af}  \EG @node asq af af_noalg,,, Summary of functions for algebraic numbers
   @subsection @code{asq}, @code{af}, @code{af_noalg}
 @findex asq  @findex asq
 @findex af  @findex af
   @findex af_noalg
   
 @table @t  @table @t
 @item asq(@var{poly})  @item asq(@var{poly})
 :: $BBe?tBN>e$N(B 1 $BJQ?tB?9`<0$NL5J?J}J,2r(B  \JP :: $BBe?tBN>e$N(B 1 $BJQ?tB?9`<0$NL5J?J}J,2r(B
   \BEG
   :: Square-free factorization of polynomial @var{poly} over an
   algebraic number field.
   \E
 @item af(@var{poly},@var{alglist})  @item af(@var{poly},@var{alglist})
 :: $BBe?tBN>e$N(B 1 $BJQ?tB?9`<0$N0x?tJ,2r(B  @itemx af_noalg(@var{poly},@var{defpolylist})
   \JP :: $BBe?tBN>e$N(B 1 $BJQ?tB?9`<0$N0x?tJ,2r(B
   \BEG
   :: Factorization of polynomial @var{poly} over an
   algebraic number field.
   \E
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $B%j%9%H(B  \JP $B%j%9%H(B
   \EG list
 @item poly  @item poly
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @item alglist  @item alglist
 @code{root} $B$N%j%9%H(B  \JP @code{root} $B$N%j%9%H(B
   \EG @code{root} list
   @item defpolylist
   \JP @code{root} $B$rI=$9ITDj85$HDj5AB?9`<0$N%Z%"$N%j%9%H(B
   \EG @code{root} list of pairs of an indeterminate and a polynomial
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 $B$$$:$l$b(B @samp{sp} $B$GDj5A$5$l$F$$$k(B.  \JP $B$$$:$l$b(B @samp{sp} $B$GDj5A$5$l$F$$$k(B.
   \EG Both defined in the file @samp{sp}.
 @item  @item
   \BJP
 @code{root} $B$r4^$^$J$$>l9g$O@0?t>e$NH!?t$,8F$S=P$5$l9bB.$G$"$k$,(B,  @code{root} $B$r4^$^$J$$>l9g$O@0?t>e$NH!?t$,8F$S=P$5$l9bB.$G$"$k$,(B,
 @code{root} $B$r4^$`>l9g$K$O(B, @code{gcda()} $B$,5/F0$5$l$k$?$a$7$P$7$P(B  @code{root} $B$r4^$`>l9g$K$O(B, @code{cr_gcda()} $B$,5/F0$5$l$k$?$a$7$P$7$P(B
 $B;~4V$,$+$+$k(B.  $B;~4V$,$+$+$k(B.
   \E
   \BEG
   If the inputs contain no @b{root}'s, these functions run fast
   since they invoke functions over the integers.
   In contrast to this, if the inputs contain @b{root}'s, they sometimes
   take a long time, since @code{cr_gcda()} is invoked.
   \E
 @item  @item
   \BJP
 @code{af()} $B$O(B, $B4pACBN$N;XDj(B, $B$9$J$o$ABh(B 2 $B0z?t$N(B, @code{root} $B$N%j%9%H(B  @code{af()} $B$O(B, $B4pACBN$N;XDj(B, $B$9$J$o$ABh(B 2 $B0z?t$N(B, @code{root} $B$N%j%9%H(B
 $B$N;XDj$,I,MW$G$"$k(B.  $B$N;XDj$,I,MW$G$"$k(B.
   \E
   \BEG
   Function @code{af()} requires the specification of base field,
   i.e., list of @b{root}'s for its second argument.
   \E
 @item  @item
   \BJP
 @code{alglist} $B$G;XDj$5$l$k(B @code{root} $B$O(B, $B8e$GDj5A$5$l$?$b$N$[$IA0$N(B  @code{alglist} $B$G;XDj$5$l$k(B @code{root} $B$O(B, $B8e$GDj5A$5$l$?$b$N$[$IA0$N(B
 $BJ}$KMh$J$1$l$P$J$i$J$$(B.  $BJ}$KMh$J$1$l$P$J$i$J$$(B.
   \E
   \BEG
   In the second argument @code{alglist}, @b{root} defined last must come
   first.
   \E
 @item  @item
 $B7k2L$O(B, $BDL>o$NL5J?J}J,2r(B, $B0x?tJ,2r$HF1MM(B [@b{$B0x;R(B}, @b{$B=EJ#EY(B}] $B$N%j%9%H$G$"$k(B.  \BJP
   @code{af(F,AL)} $B$K$*$$$F(B, @code{AL} $B$OBe?tE*?t$N%j%9%H$G$"$j(B, $BM-M}?tBN$N(B
   $BBe?t3HBg$rI=$9(B. @code{AL=[An,...,A1]} $B$H=q$/$H$-(B, $B3F(B @code{Ak} $B$O(B, $B$=$l$h$j(B
   $B1&$K$"$kBe?tE*?t$r78?t$H$7$?(B, $B%b%K%C%/$JDj5AB?9`<0$GDj5A$5$l$F$$$J$1$l$P(B
   $B$J$i$J$$(B.
   \E
   \BEG
   In @code{af(F,AL)}, @code{AL} denotes a list of @code{roots} and it
   represents an algebraic number field. In @code{AL=[An,...,A1]} each
   @code{Ak} should be defined as a root of a defining polynomial
   whose coefficients are in @code{Q(A(k+1),...,An)}.
   \E
   
   @example
   [1] A1 = newalg(x^2+1);
   [2] A2 = newalg(x^2+A1);
   [3] A3 = newalg(x^2+A2*x+A1);
   [4] af(x^2+A2*x+A1,[A2,A1]);
   [[x^2+(#1)*x+(#0),1]]
   @end example
   
   \BJP
   @code{af_noalg} $B$G$O(B, @var{poly} $B$K4^$^$l$kBe?tE*?t(B @var{ai} $B$rITDj85(B @var{vi}
   $B$GCV$-49$($k(B. @code{defpolylist} $B$O(B, @var{[[vn,dn(vn,...,v1)],...,[v1,d(v1)]]}
   $B$J$k%j%9%H$G$"$k(B. $B$3$3$G(B @var{di(vi,...,v1)} $B$O(B @var{ai} $B$NDj5AB?9`<0$K$*$$$F(B
   $BBe?tE*?t$rA4$F(B @var{vj} $B$KCV$-49$($?$b$N$G$"$k(B.
   \E
   \BEG
   To call @code{sp_noalg}, one should replace each algebraic number
   @var{ai} in @var{poly} with an indeterminate @var{vi}. @code{defpolylist}
   is a list @var{[[vn,dn(vn,...,v1)],...,[v1,d(v1)]]}. In this expression
   @var{di(vi,...,v1)} is a defining polynomial of @var{ai} represented
   as a multivariate polynomial.
   \E
   
   @example
   [1] af_noalg(x^2+a2*x+a1,[[a2,a2^2+a1],[a1,a1^2+1]]);
   [[x^2+a2*x+a1,1]]
   @end example
   
 @item  @item
 $B=EJ#EY$r9~$a$?0x;R$NA4$F$N@Q$O(B, @var{poly} $B$HDj?tG\$N0c$$$,$"$jF@$k(B.  \BJP
   $B7k2L$O(B, $BDL>o$NL5J?J}J,2r(B, $B0x?tJ,2r$HF1MM(B [@b{$B0x;R(B}, @b{$B=EJ#EY(B}]
   $B$N%j%9%H$G$"$k(B. @code{af_noalg} $B$N>l9g(B, @b{$B0x;R(B} $B$K8=$l$kBe?tE*?t$O(B,
   @var{defpolylist} $B$K=>$C$FITDj85$KCV$-49$($i$l$k(B.
   \E
   \BEG
   The result is a list, as a result of usual factorization, whose elements
   is of the form [@b{factor}, @b{multiplicity}].
   In the result of @code{af_noalg}, algebraic numbers in @v{factor} are
   replaced by the indeterminates according to @var{defpolylist}.
   \E
   @item
   \JP $B=EJ#EY$r9~$a$?0x;R$NA4$F$N@Q$O(B, @var{poly} $B$HDj?tG\$N0c$$$,$"$jF@$k(B.
   \BEG
   The product of all factors with multiplicities counted may differ from
   the input polynomial by a constant.
   \E
 @end itemize  @end itemize
   
 @example  @example
   [98] A = newalg(t^2-2);
   (#0)
 [99] asq(-x^4+6*x^3+(2*alg(0)-9)*x^2+(-6*alg(0))*x-2);  [99] asq(-x^4+6*x^3+(2*alg(0)-9)*x^2+(-6*alg(0))*x-2);
 [[-x^2+3*x+(#0),2]]  [[-x^2+3*x+(#0),2]]
 [100] af(-x^2+3*x+alg(0),[alg(0)]);  [100] af(-x^2+3*x+alg(0),[alg(0)]);
 [[x+(#0-1),1],[-x+(#0+2),1]]  [[x+(#0-1),1],[-x+(#0+2),1]]
   [101] af_noalg(-x^2+3*x+a,[[a,x^2-2]]);
   [[x+a-1,1],[-x+a+2,1]]
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
 @fref{gcda}, @fref{fctr sqfr}  \EG @item Reference
   @fref{cr_gcda}, @fref{fctr sqfr}
 @end table  @end table
   
 @node sp,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B  \JP @node sp sp_noalg,,, $BBe?tE*?t$K4X$9$kH!?t$N$^$H$a(B
 @subsection @code{sp}  \EG @node sp sp_noalg,,, Summary of functions for algebraic numbers
   @subsection @code{sp}, @code{sp_noalg}
 @findex sp  @findex sp
   
 @table @t  @table @t
 @item sp(@var{poly})  @item sp(@var{poly})
 :: $B:G>.J,2rBN$r5a$a$k(B.  @itemx sp_noalg(@var{poly})
   \JP :: $B:G>.J,2rBN$r5a$a$k(B.
   \EG :: Finds the splitting field of polynomial @var{poly} and splits.
 @end table  @end table
   
 @table @var  @table @var
 @item return  @item return
 $B%j%9%H(B  \JP $B%j%9%H(B
   \EG list
 @item poly  @item poly
 $BB?9`<0(B  \JP $BB?9`<0(B
   \EG polynomial
 @end table  @end table
   
 @itemize @bullet  @itemize @bullet
 @item  @item
 @samp{sp} $B$GDj5A$5$l$F$$$k(B.  \JP @samp{sp} $B$GDj5A$5$l$F$$$k(B.
   \EG Defined in the file @samp{sp}.
 @item  @item
   \BJP
 $BM-M}?t78?t$N(B 1 $BJQ?tB?9`<0(B @var{poly} $B$N:G>.J,2rBN(B, $B$*$h$S$=$NBN>e$G$N(B  $BM-M}?t78?t$N(B 1 $BJQ?tB?9`<0(B @var{poly} $B$N:G>.J,2rBN(B, $B$*$h$S$=$NBN>e$G$N(B
 @var{poly} $B$N(B 1 $B<!0x;R$X$NJ,2r$r5a$a$k(B.  @var{poly} $B$N(B 1 $B<!0x;R$X$NJ,2r$r5a$a$k(B.
   \E
   \BEG
   Finds the splitting field of @var{poly}, an uni-variate polynomial
   over with rational coefficients, and splits it into its linear factors
   over the field.
   \E
 @item  @item
   \BJP
 $B7k2L$O(B, @var{poly} $B$N0x;R$N%j%9%H$H(B, $B:G>.J,2rBN$N(B, $BC`<!3HBg$K$h$kI=8=(B  $B7k2L$O(B, @var{poly} $B$N0x;R$N%j%9%H$H(B, $B:G>.J,2rBN$N(B, $BC`<!3HBg$K$h$kI=8=(B
 $B$+$i$J$k%j%9%H$G$"$k(B.  $B$+$i$J$k%j%9%H$G$"$k(B. @code{sp_noalg} $B$G$O(B, $BA4$F$NBe?tE*?t$,(B, $BBP1~$9$k(B
   $BITDj85(B ($BB($A(B @code{#i} $B$KBP$9$k(B @code{t#i}) $B$KCV$-49$($i$l$k(B. $B$3$l$K(B
   $B$h$j(B, @code{sp_noalg} $B$N=PNO$O(B, $B@0?t78?tB?JQ?tB?9`<0$N%j%9%H$H$J$k(B.
   \E
   \BEG
   The result consists of a two element list: The first element is
   the list of all linear factors of @var{poly}; the second element is
   a list which represents the successive extension of the field.
   In the result of @code{sp_noalg} all the algebraic numbers are replaced
   by the special indeterminate associated with it, that is @code{t#i}
   for @code{#i}. By this operation the result of @code{sp_noalg}
   is a list containing only integral polynomials.
   \E
 @item  @item
   \BJP
 $B:G>.J,2rBN$O(B, @code{[root,algptorat(defpoly(root))]} $B$N%j%9%H$H$7$F(B  $B:G>.J,2rBN$O(B, @code{[root,algptorat(defpoly(root))]} $B$N%j%9%H$H$7$F(B
 $BI=8=$5$l$F$$$k(B. $B$9$J$o$A(B, $B5a$a$k:G>.J,2rBN$O(B, $BM-M}?tBN$K(B, $B$3$N(B @code{root}  $BI=8=$5$l$F$$$k(B. $B$9$J$o$A(B, $B5a$a$k:G>.J,2rBN$O(B, $BM-M}?tBN$K(B, $B$3$N(B @code{root}
 $B$rA4$FE:2C$7$?BN$H$7$FF@$i$l$k(B. $BE:2C$O(B, $B1&$NJ}$N(B @code{root} $B$+$i=g$K(B  $B$rA4$FE:2C$7$?BN$H$7$FF@$i$l$k(B. $BE:2C$O(B, $B1&$NJ}$N(B @code{root} $B$+$i=g$K(B
 $B9T$o$l$k(B.  $B9T$o$l$k(B.
   \E
   \BEG
   The splitting field is represented as a list of pairs of form
   @code{[root,algptorat(defpoly(root))]}.
   In more detail, the list is interpreted as a representation
   of successive extension obtained by adjoining @b{root}'s
   to the rational number field.  Adjoining is performed from the right
   @b{root} to the left.
   \E
 @item  @item
   \BJP
 @code{sp()} $B$O(B, $BFbIt$G%N%k%`$N7W;;$N$?$a$K(B @code{sp_norm()} $B$r$7$P$7$P(B  @code{sp()} $B$O(B, $BFbIt$G%N%k%`$N7W;;$N$?$a$K(B @code{sp_norm()} $B$r$7$P$7$P(B
 $B5/F0$9$k(B. $B%N%k%`$N7W;;$O(B, $B>u67$K1~$8$F$5$^$6$^$JJ}K!$G9T$o$l$k$,(B,  $B5/F0$9$k(B. $B%N%k%`$N7W;;$O(B, $B>u67$K1~$8$F$5$^$6$^$JJ}K!$G9T$o$l$k$,(B,
 $B$=$3$GMQ$$$i$l$kJ}K!$,:GA1$H$O8B$i$:(B, $BC1=c$J=*7k<0$N7W;;$NJ}$,9bB.(B  $B$=$3$GMQ$$$i$l$kJ}K!$,:GA1$H$O8B$i$:(B, $BC1=c$J=*7k<0$N7W;;$NJ}$,9bB.(B
 $B$G$"$k>l9g$b$"$k(B.  $B$G$"$k>l9g$b$"$k(B.
 $BBg0hJQ?t(B @code{USE_RES} $B$r(B 1 $B$K@_Dj$9$k$3$H$K$h$j(B, $B>o$K=*7k<0$K$h$j7W;;(B  $BBg0hJQ?t(B @code{USE_RES} $B$r(B 1 $B$K@_Dj$9$k$3$H$K$h$j(B, $B>o$K=*7k<0$K$h$j7W;;(B
 $B$5$;$k$3$H$,$G$-$k(B.  $B$5$;$k$3$H$,$G$-$k(B.
   \E
   \BEG
   @code{sp()} invokes @code{sp_norm()} internally. Computation of norm
   is done by several methods according to the situation but the algorithm
   selection is not always optimal and a simple resultant computation is
   often superior to the other methods.
   By setting the global variable @code{USE_RES} to 1,
   the builtin function @code{res()} is always used.
   \E
 @end itemize  @end itemize
   
 @example  @example
Line 819  x^12+2*x^8+5*x^4+1
Line 1443  x^12+2*x^8+5*x^4+1
 @end example  @end example
   
 @table @t  @table @t
 @item $B;2>H(B  \JP @item $B;2>H(B
 @fref{asq af}, @fref{defpoly}, @fref{algptorat}, @fref{sp_norm}.  \EG @item Reference
   @fref{asq af af_noalg}, @fref{defpoly}, @fref{algptorat}, @fref{sp_norm}.
 @end table  @end table
   

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