Top
Back: D.5.6.1 detadj
Forward: D.5.6.3 jacoblift
FastBack: Appendix D SINGULAR libraries
FastForward: E Release Notes
Up: D.5.6 mondromy_lib
Top: 1 Preface
Contents: Table of Contents
Index: F Index
About: About This Document

D.5.6.2 invunit

Procedure from library mondromy.lib (see section mondromy_lib).

Usage:

invunit(u,n); u poly, n int

Assume:

The polynomial u is a series unit.

Return:

The procedure returns the series inverse of u up to order n or a zero polynomial if u is no series unit.

Display:

The procedure displays comments if printlevel>=1.

Example:

LIB "mondromy.lib";
ring R=0,(x,y),dp;
invunit(2+x3+xy4,10);
→ 1/8x2y8-1/16x9+1/4x4y4+1/8x6-1/4xy4-1/4x3+1/2

Top Back: D.5.6.1 detadj Forward: D.5.6.3 jacoblift FastBack: Appendix D SINGULAR libraries FastForward: E Release Notes Up: D.5.6 mondromy_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.