Top
Back: dmodAction
Forward: simplifyRat
FastBack: ratgb_lib
FastForward: ncpreim_lib
Up: dmodloc_lib
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document
7.7.19.0. dmodActionRat
Procedure from library dmodloc.lib (see dmodloc_lib).

Usage:
dmodActionRat(id,w); id ideal or poly, f vector

Assume:
The basering is the n-th Weyl algebra W over a field of characteristic 0 and for all 1<=i<=n the identity
var(i+n)*var(i)=var(i)*var(i+1)+1 holds, i.e. the sequence of variables is given by x(1),...,x(n),D(1),...,D(n), where D(i) is the differential operator belonging to x(i).
Further, assume that w has exactly two components, second one not 0, and that w does not contain any D(i).

Return:
same type as id, the result of the natural D-module action of id on the rational function w[1]/w[2]

Example:
 


Top Back: dmodAction Forward: simplifyRat FastBack: ratgb_lib FastForward: ncpreim_lib Up: dmodloc_lib Top: Singular Manual Contents: Table of Contents Index: Index About: About this document
            User manual for Singular version 3-1-6, Dec 2012, generated by texi2html.