D.4.1.10 mapIsFinite

Procedure from library algebra.lib (see algebra_lib).

Usage:

mapIsFinite(phi,R[,J]); R a ring, phi: R —> basering a map J an ideal in the basering, J = 0 if not given

Return:

1 if R —> basering/J is finite and 0 else

Example:

LIB "algebra.lib";
ring r = 0,(a,b,c),dp;
ring s = 0,(x,y,z),dp;
ideal i= xy;
map phi= r,(xy)^3+x2+z,y2-1,z3;
mapIsFinite(phi,r,i);
→ 1