Hi! In gsl 0.9.2, gsl_sf_poly_eval is not linking properly, but gsl_poly_eval links correctly. But, I've tested this one, and it returns always zero. Is it's my fault, please, send me an example. Alberto -- | Alberto Manuel Brandão Simões | | albie@alfarrabio.di.uminho.pt | | http://numexp.sourceforge.net |