Content and Primpart are ``placeholders'' for a content and primitive part of a polynomial over a coefficient domain. They are used in conjunction with mod and evala as described below.

The calls Content(a, x) mod p and Primpart(a, x) mod p compute the content and primitive part of a respectively modulo the prime integer p. The argument a must be a multivariate polynomial over the rationals or over a finite field specified by RootOfs. See content for more information.

The calls evala(Content(a,x)) and evala(Primpart(a,x)) compute a content and a primitive part of a respectively over a coefficient domain which may include algebraic numbers and algebraic functions.  The polynomial a must be a multivariate polynomial with algebraic number (or function) coefficients specified by RootOfs or radicals. See evala,Content for more information.

The optional arguments 'pp' and 'co' are assigned a/Content(a) and a/Primpart(a) respectively, computed over the appropriate coefficient domain.