Hi, You will find attached to this mail the header file of the pow function, a cpp test file and the documentation in .qbk format. I tried to write docs and tests in accordance to those found in the math library. The files are ready for integration since I placed them respectively into boost/math, libs/math/test and libs/math/doc in my own environment. Let me know if anything has to be changed or added. I passed the tests on : - gcc-2.95 (debian) - gcc-3.3 (debian) - gcc-3.4 (debian) - gcc-4.1 (kubuntu) - icc-10.1 (debian) - msvc-8.0 (XP SP2) - msvc-9.0 (XP SP2) It didn't compile with msvc-6.5. It's not surprising since, if I remember well, this compiler doesn't handle partial template specialization even with SP5. Is this compiler still officially supported by Boost? There is one case for which I don't know what to do : the pow<negative value>(0) case, which obviously crashes since it consists of computing 1/0. Should I check it and throw something, or let the platform's division by 0 behavior (if any) do its effect? I personally think the first approach is better since it ensures an uniform behavior accross platforms. The return type is a double. Now I'm going to study the possibility of having different possible return types. Regards Bruno