On Tue, 16 Nov 2004, Isidro [iso-8859-15] Cachadiña Gutiérrez wrote:
I am using cln with real numbers. I have a problem in the expt function... [...]
I also can define this function as:
cln::cl_R expt(cln::cl_R x, cln::cl_R y) { return exp(x*ln(y)); }
And It works fine, but I think that It have to be defined somewhere in the library.
Well, only if `x' is positive, right? Or if `y' is integer. But that signature is there, as you've already seen. Otherwise, the range of the exponentiation function isn't R anyway, so you could equally well use expt(cl_N,cl_N), returning an cl_N object. Maybe it would be worthwhile though, considering the fact that we also have sqrt(cl_R) defined only for arguments >= 0 without type checks for that. But given the other signatures, I see only very limited use. Saludos -richy. -- Richard B. Kreckel <http://www.ginac.de/~kreckel/>