Top
Back: detadj
Forward: jacoblift
FastBack: hnoether_lib
FastForward: qhmoduli_lib
Up: mondromy_lib
Top: Singular 2-0-4 Manual
Contents: Table of Contents
Index: Index
About: About this document

D.5.6.2 invunit

Procedure from library mondromy.lib (see 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: detadj Forward: jacoblift FastBack: hnoether_lib FastForward: qhmoduli_lib Up: mondromy_lib Top: Singular 2-0-4 Manual Contents: Table of Contents Index: Index About: About this document
            User manual for Singular version 2-0-4, May 2003, generated by texi2html.