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Annotation of OpenXM_contrib/PHC/Ada/Schubert/curves_into_grassmannian_io.ads, Revision 1.1.1.1

1.1       maekawa     1: with Standard_Natural_Matrices;          use Standard_Natural_Matrices;
                      2: with Brackets;                           use Brackets;
                      3:
                      4: package Curves_into_Grassmannian_io is
                      5:
                      6: -- DESCRIPTION :
                      7: --   This package facilitates output of curves of degree q that produce
                      8: --   p-planes in n-dimensional space, where n = m+p.
                      9:
                     10:   procedure One_Set_up_Symbol_Table
                     11:                                ( m,p,q : in natural; top,bottom : in Bracket );
                     12:   procedure Two_Set_up_Symbol_Table
                     13:                                ( m,p,q : in natural; top,bottom : in Bracket );
                     14:
                     15:   -- DESCRIPTION :
                     16:   --   Set up of the symbol table with enough symbols to represent the
                     17:   --   matrix of polynomials as prescribed in the localization pattern.
                     18:   --   The polynomials in the matrix are polynomials in "s" and "t" which are
                     19:   --   the first two variables in the symbol table.  The other variables are
                     20:   --   added columnwise in the pattern defined by top and bottom brackets.
                     21:   --   The x_ij's are represented by "xijsk": k-th block at (i,j)-th place.
                     22:   --   If the symbol table is not empty on calling this procedure,
                     23:   --   then its contents will be destroyed and replaced by the x_ij's.
                     24:   --   One_* : top or bottom type; Two_* : mixed type of node.
                     25:
                     26:   procedure Reduce_Symbols ( top,bottom : in Bracket; locmap : in Matrix );
                     27:
                     28:   -- DESCRIPTION :
                     29:   --   Removes the symbols that correspond to the ones in the localization
                     30:   --   map prescribed by top and bottom pivots.
                     31:
                     32: end Curves_into_Grassmannian_io;