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B.7.0.14 UpOneMatrix

Procedure from library nctools.lib (see nctools_lib).

Usage:
UpOneMatrix(N); N an integer, the number of columns

Return:
intmat, NxN matrix with 1's in the whole upper triagle

Note:
helpful for setting noncommutative algebras with complicated coefficient matrices

Example:
 
LIB "nctools.lib";
ring r=(0,q),(x,y,z),dp;
matrix C=UpOneMatrix(3);
C[1,3]=q;
ncalgebra(C,0);
r;
==> //   characteristic : 0
==> //   1 parameter    : q 
==> //   minpoly        : 0
==> //   number of vars : 3
==> //        block   1 : ordering dp
==> //                  : names    x y z 
==> //        block   2 : ordering C
==> //   noncommutative relations:
==> //    zx=(q)*xz


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            User manual for Singular version 2-1-99, August 2004, generated by texi2html.