D.13.6.31 parameterSubstitute

Usage:

parameterSubstitute(f,N); f poly, N int

Assume:

f is a polynomial in Q(t)[x_1,...,x_n] describing
a plane curve over Q(t)

Return:

poly f with t replaced by t^N

LIB "tropical.lib";
ring r=(0,t),(x,y),dp;
poly f=t2xy+1/t*y+t3;
parameterSubstitute(f,3);
==> (t6)*xy+1/(t3)*y+(t9)
parameterSubstitute(f,-1);
==> 1/(t2)*xy+(t)*y+1/(t3)