Polynomials

How can I set the coefficient domain of polynomials? Say, I want my coefficients to be in Z mod 17, i.e. Galois Field 17, what do I do? Also, as a more general question, I'd like to know if GiNac poses any overhead on the polynomial classes provided by CLN. In other words, it is less efficient to write polynomials routines in Normal.cpp (the polynomial module in GiNac) than directly work with the CLN classes? Thanks in advance for your answers! Wolfgang - To UNSUBSCRIBE, email to ginac-list@ginac.de with a subject of "unsubscribe".