Re: [GiNaC-list] coeff() method

Hi again,

Where can I find the specification for coeff()?

See the paragraph "Degree and coefficients" in the section "Polynomial arithmetic". Basically, coeff extracts a coefficient with a certain power from an expanded polynomial (that is, in e.coeff(x, n) e should be expanded w.r.t. x). Thus the first argument should be a symbol. Simetimes one can get sensible result even if the argument is not a symbol (see the examples in the manual). But in this case the only guarantee is that e.coeff(e, 1) is 1. Hope this helps, Alexei