On Tue, Oct 16, 2012 at 01:16:53PM +0200, Carl Christoph Jung wrote: > has anybody routines for the exponential function and the logarithm? Assuming that you speak of multiprecision floating point operations, you might wish to look at gnu mpfr http://www.mpfr.org/ for real and gnu mpc http://mpc.multiprecision.org/ for complex numbers. Andreas