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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:
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