5.1.71 leadcoef

Syntax:

leadcoef ( poly_expression )
leadcoef ( vector_expression )

Type:

number

Purpose:

returns the leading (or initial) coefficient of a polynomial or a vector with respect to the monomial ordering.

Example:

ring r=32003,(x,y,z),(c,ds); poly f=x2+y+z3; vector v=[2*x^10,f]; leadcoef(f); ==> 1 leadcoef(v); ==> 2 leadcoef(0); ==> 0