I have a generating function programmed with two variables, for which I wish to find the coefficients of each polynomial in the series expansion, i.e. coefficiecnt of xy, x^2y, x^2y^2,...
For example, using a simple function such as f(x,y)=1/(2-x*y) g(x,y)=f(x,y).series(x,4) [results in g(x,y) = 1/8*x^2*y^2+1/4*x*y+1/2] I have found a way of obtaining the coefficients of x using: u(x,y).coefficients() or u(x,y).coefficient(x^2) to give the coefficient of x^2 alone as y^2 for example Is there a way to extend this argument to find the coefficients of multivariate polynomials, e.g.x^2y^2? I have tried u(x,y).coefficient(x^2*y^2), but thus gives an incorrect answer of 0 (should be 1/8) And u(x,y).coefficents() which simply lists coefficients of various powers of x Thanks, Julie -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
