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D.4.9.1 modStd

Procedure from library modstd.lib (see modstd_lib).

Usage:
modStd(I);

Return:
a standard basis of I if no warning appears;

Note:
the procedure computes a standard basis of I (over the
rational numbers) by using modular methods. If a
warning appears then the result is a standard basis with no defined relation to I; this is a sign that not enough prime numbers have been used. For further experiments see procedure modS.

Example:
 
LIB "modstd.lib";
ring r=0,(x,y,z),dp;
ideal I=3x3+x2+1,11y5+y3+2,5z4+z2+4;
ideal J=modStd(I);
J;
==> J[1]=3x3+x2+1
==> J[2]=5z4+z2+4
==> J[3]=11y5+y3+2


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            User manual for Singular version 3-0-4, Nov 2007, generated by texi2html.