Top
Back: psigncnd
Forward: zeroset_lib
FastBack:
FastForward:
Up: signcond_lib
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document

D.8.9.3 firstoct

Procedure from library signcond.lib (see signcond_lib).

Usage:
firstoct(I); I ideal

Return:
number: the number of points of V(I) lying in the first octant

Assume:
I is given by a Groebner basis.

Example:
 
LIB "signcond.lib";
ring r = 0,(x,y),dp;
ideal i = (x-2)*(x+3)*x,y*(y-1);
firstoct(i);
==> 1
See also: signcnd.

Top Back: psigncnd Forward: zeroset_lib FastBack: FastForward: Up: signcond_lib Top: Singular Manual Contents: Table of Contents Index: Index About: About this document
            User manual for Singular version 4.4.1, 2025, generated by texi2html.