polylib::support – support of a polynomial

polylib::support(p) returns the support of p, that is the list of indices with non zero coefficient in p.

→ Examples

Call:

polylib::support(p)

Parameters:

p: 

A polynomial or more generaly a free module element (see Cat::ModuleWithBasis). 

Return Value:

A list of elements of the support.

Example 1:

The support of a multivariate polynomial is the list of the degree vectors of its terms:

polylib::support(poly(x*y*z + x + 1, [x, y, z]))

math

For a univariate polynomial, the support is the list of the degrees of its terms. In the following polynomial x appears with degrees 3, 1, and 0:

polylib::support(Dom::UnivariatePolynomial(x)(x^3*y*z + x + 1))

math