5.1.90 ord

Syntax:

ord ( poly_expression )
ord ( vector_expression )

Type:

int

Purpose:

returns the (weighted) degree of the initial term of a polynomial or a vector; the weights are the weights used for the first block of the ring ordering.

Note:

ord(0) is -1.

Example:

ring r=7,(x,y),wp(2,3); ord(0); → -1 poly f=x2+y3; // weight on y is 3 ord(f); → 9 ring R=7,(x,y),ws(2,3); poly f=x2+y3; ord(f); → 4 vector v=[x2,y]; ord(v); → 3

See deg; poly; vector.