Top
Back: D.7.1.7 hilbvec
Forward: D.7.1.9 tolessvars
FastBack: Appendix D SINGULAR libraries
FastForward: E Release Notes
Up: D.7.1 presolve_lib
Top: 1 Preface
Contents: Table of Contents
Index: F Index
About: About This Document

D.7.1.8 linearpart

Procedure from library presolve.lib (see section presolve_lib).

Usage:

linearpart(id); id=ideal/module

Return:

generators of id of total degree <= 1

Example:

LIB "presolve.lib";
ring r=0,(x,y,z),dp;
ideal i=1+x+x2+x3,3,x+3y+5z;
linearpart(i);
→ _[1]=3
→ _[2]=x+3y+5z
module m=[x,y,z],x*[x3,y2,z],[1,x2,z3,0,1];
show(linearpart(m));
→ // module, 1 generator(s)
→ [x,y,z]

Top Back: D.7.1.7 hilbvec Forward: D.7.1.9 tolessvars FastBack: Appendix D SINGULAR libraries FastForward: E Release Notes Up: D.7.1 presolve_lib Top: 1 Preface Contents: Table of Contents Index: F Index About: About This Document
            User manual for Singular version 2-0-4, October 2002, generated by texinfo.