| version 1.12, 2003/04/20 08:01:27 |
version 1.14, 2016/03/22 07:25:14 |
|
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| @comment $OpenXM: OpenXM/src/asir-doc/parts/type.texi,v 1.11 2003/04/19 15:44:57 noro Exp $ |
@comment $OpenXM: OpenXM/src/asir-doc/parts/type.texi,v 1.13 2007/02/15 02:41:38 noro Exp $ |
| \BJP |
\BJP |
| @node $B7?(B,,, Top |
@node $B7?(B,,, Top |
| @chapter $B7?(B |
@chapter $B7?(B |
| Line 451 result shall be computed as a double float number. |
|
| Line 451 result shall be computed as a double float number. |
|
| @b{bigfloat} |
@b{bigfloat} |
| @* |
@* |
| \BJP |
\BJP |
| @b{bigfloat} $B$O(B, @b{Asir} $B$G$O(B @b{PARI} $B%i%$%V%i%j$K$h$j(B |
@b{bigfloat} $B$O(B, @b{Asir} $B$G$O(B @b{MPFR} $B%i%$%V%i%j$K$h$j(B |
| $B<B8=$5$l$F$$$k(B. @b{PARI} $B$K$*$$$F$O(B, @b{bigfloat} $B$O(B, $B2>?tIt(B |
$B<B8=$5$l$F$$$k(B. @b{MPFR} $B$K$*$$$F$O(B, @b{bigfloat} $B$O(B, $B2>?tIt(B |
| $B$N$_G$0UB?G\D9$G(B, $B;X?tIt$O(B 1 $B%o!<%I0JFb$N@0?t$K8B$i$l$F$$$k(B. |
$B$N$_G$0UB?G\D9$G(B, $B;X?tIt$O(B 64bit $B@0?t$G$"$k(B. |
| @code{ctrl()} $B$G(B @b{bigfloat} $B$rA*Br$9$k$3$H$K$h$j(B, $B0J8e$NIbF0>.?t(B |
@code{ctrl()} $B$G(B @b{bigfloat} $B$rA*Br$9$k$3$H$K$h$j(B, $B0J8e$NIbF0>.?t(B |
| $B$NF~NO$O(B @b{bigfloat} $B$H$7$F07$o$l$k(B. $B@:EY$O%G%U%)%k%H$G$O(B |
$B$NF~NO$O(B @b{bigfloat} $B$H$7$F07$o$l$k(B. $B@:EY$O%G%U%)%k%H$G$O(B |
| 10 $B?J(B 9 $B7eDxEY$G$"$k$,(B, @code{setprec()} $B$K$h$j;XDj2DG=$G$"$k(B. |
10 $B?J(B 9 $B7eDxEY$G$"$k$,(B, @code{setprec()}, @code{setbprec()} $B$K$h$j;XDj2DG=$G$"$k(B. |
| \E |
\E |
| \BEG |
\BEG |
| The @b{bigfloat} numbers of @b{Asir} is realized by @b{PARI} library. |
The @b{bigfloat} numbers of @b{Asir} is realized by @b{MPFR} library. |
| A @b{bigfloat} number of @b{PARI} has an arbitrary precision mantissa |
A @b{bigfloat} number of @b{MPFR} has an arbitrary precision mantissa |
| part. However, its exponent part admits only an integer with a single |
part. However, its exponent part admits only a 64bit integer. |
| word precision. |
|
| Floating point operations will be performed all in @b{bigfloat} after |
Floating point operations will be performed all in @b{bigfloat} after |
| activating the @b{bigfloat} switch by @code{ctrl()} command. |
activating the @b{bigfloat} switch by @code{ctrl()} command. |
| The default precision is about 9 digits, which can be specified by |
The default precision is 53 bits (about 15 digits), which can be specified by |
| @code{setprec()} command. |
@code{setbprec()} and @code{setprec()} command. |
| \E |
\E |
| |
|
| @example |
@example |
| [0] ctrl("bigfloat",1); |
[0] ctrl("bigfloat",1); |
| 1 |
1 |
| [1] eval(2^(1/2)); |
[1] eval(2^(1/2)); |
| 1.414213562373095048763788073031 |
1.4142135623731 |
| [2] setprec(100); |
[2] setprec(100); |
| 9 |
15 |
| [3] eval(2^(1/2)); |
[3] eval(2^(1/2)); |
| 1.41421356237309504880168872420969807856967187537694807317... |
1.41421356237309504880168872420969807856967187537694...764157 |
| |
[4] setbprec(100); |
| |
332 |
| |
[5] 1.41421356237309504880168872421 |
| @end example |
@end example |
| |
|
| \BJP |
\BJP |
| @code{eval()} $B$O(B, $B0z?t$K4^$^$l$kH!?tCM$r2DG=$J8B$j?tCM2=$9$kH!?t$G$"$k(B. |
@code{eval()} $B$O(B, $B0z?t$K4^$^$l$kH!?tCM$r2DG=$J8B$j?tCM2=$9$kH!?t$G$"$k(B. |
| @code{setprec()} $B$G;XDj$5$l$?7e?t$O(B, $B7k2L$N@:EY$rJ]>Z$9$k$b$N$G$O$J$/(B, |
@code{setbprec()} $B$G;XDj$5$l$?(B2 $B?J7e?t$O(B, $B4]$a%b!<%I$K1~$8$?7k2L$N@:EY$rJ]>Z$9$k(B. @code{setprec()} $B$G;XDj$5$l$k(B10$B?J7e?t$O(B 2 $B?J7e?t$KJQ49$5$l$F@_Dj$5$l$k(B. |
| @b{PARI} $BFbIt$GMQ$$$i$l$kI=8=$N%5%$%:$r<($9$3$H$KCm0U$9$Y$-$G$"$k(B. |
|
| \E |
\E |
| \BEG |
\BEG |
| Function @code{eval()} evaluates numerically its argument as far as |
Function @code{eval()} evaluates numerically its argument as far as |
| possible. |
possible. |
| Notice that the integer given for the argument of @code{setprec()} does |
Notice that the integer given for the argument of @code{setbprec()} |
| not guarantee the accuracy of the result, |
guarantees the accuracy of the result according to the current rounding mode. |
| but it indicates the representation size of numbers with which internal |
The argument of @code{setbprec()} is converted to the corresonding bit length |
| operations of @b{PARI} are performed. |
and set. |
| \E |
\E |
| (@xref{eval deval}, @ref{pari}.) |
(@xref{eval deval}.) |
| |
|
| @item 4 |
@item 4 |
| \JP @b{$BJ#AG?t(B} |
\JP @b{$BJ#AG?t(B} |
| Line 667 GF(@var{p^n}) $B$N>hK!72$N@8@.85$r8GDj$9$k$3$H(B |
|
| Line 669 GF(@var{p^n}) $B$N>hK!72$N@8@.85$r8GDj$9$k$3$H(B |
|
| \BEG |
\BEG |
| A finite field of order @var{p^n}, where @var{p^n} must be less than |
A finite field of order @var{p^n}, where @var{p^n} must be less than |
| @var{2^29} and @var{n} must be equal to 1 if @var{p} is greater or |
@var{2^29} and @var{n} must be equal to 1 if @var{p} is greater or |
| equal to @var{2^14}@, |
equal to @var{2^14}, |
| is set by @code{setmod_ff} |
is set by @code{setmod_ff} |
| by specifying its characteristic @var{p} the extension degree |
by specifying its characteristic @var{p} the extension degree |
| @var{n}. If @var{p} is less than @var{2^14}, each non-zero element |
@var{n}. If @var{p} is less than @var{2^14}, each non-zero element |
| Line 679 This specification is useful for treating both cases i |
|
| Line 681 This specification is useful for treating both cases i |
|
| program. |
program. |
| \E |
\E |
| |
|
| |
@item 10 |
| |
\JP @b{$B0L?t(B @var{p^n} $B$N>.0L?tM-8BBN$NBe?t3HBg$N85(B} |
| |
\EG @b{element of a finite field which is an algebraic extension of a small finite field of characteristic @var{p^n}} |
| |
|
| |
\BJP |
| |
$BA09`$N(B, $B0L?t$,(B @var{p^n} $B$N>.0L?tM-8BBN$N(B @var{m} $B<!3HBg$N85$G$"$k(B. |
| |
$BI8?t(B @var{p} $B$*$h$S3HBg<!?t(B @var{n}, @var{m} |
| |
$B$r(B @code{setmod_ff} $B$K$h$j;XDj$9$k$3$H$K$h$j@_Dj$9$k(B. $B4pACBN>e$N(B @var{m} |
| |
$B<!4{LsB?9`<0$,<+F0@8@.$5$l(B, $B$=$NBe?t3HBg$N@8@.85$NDj5AB?9`<0$H$7$FMQ$$$i$l$k(B. |
| |
$B@8@.85$O(B @code{@@s} $B$G$"$k(B. |
| |
|
| |
\E |
| |
\BEG |
| |
An extension field @var{K} of the small finite field @var{F} of order @var{p^n} |
| |
is set by @code{setmod_ff} |
| |
by specifying its characteristic @var{p} the extension degree |
| |
@var{n} and @var{m}=[@var{K}:@var{F}]. An irreducible polynomial of degree @var{m} |
| |
over @var{K} is automatically generated and used as the defining polynomial of |
| |
the generator of the extension @var{K/F}. The generator is denoted by @code{@@s}. |
| |
\E |
| |
|
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@item 11 |
| |
\JP @b{$BJ,;6I=8=$NBe?tE*?t(B} |
| |
\EG @b{algebraic number represented by a distributed polynomial} |
| |
@* |
| |
\JP @xref{$BBe?tE*?t$K4X$9$k1i;;(B}. |
| |
\EG @xref{Algebraic numbers}. |
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|
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\BJP |
| |
|
| |
\E |
| |
\BEG |
| |
\E |
| @end table |
@end table |
| |
|
| \BJP |
\BJP |
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