7.5.14.0. multRat

Usage:

multRat(v,w); v,w vectors

Assume:

Assume that v,w have exactly two components, second ones not 0.

Return:

vector, representing rational function (v[1]/v[2])*(w[1]/w[2])

Note:

Possibly present non-commutative relations of the basering are ignored.

LIB "dmodloc.lib";
ring r = 0,(x,y),dp;
vector v = [x,y];
vector w = [y,x];
multRat(v,w);
==> gen(2)+gen(1)
multRat(v,w) - [1,1];
==> 0