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5.1.74 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
See lead; leadexp; leadmonom; poly; vector.