7.7.21.0. addRat

Usage:

addRat(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];
addRat(v,w);
==> x2*gen(1)+xy*gen(2)+y2*gen(1)
addRat(v,w) - [x2+y2,xy];
==> 0