pFq
Generalized Hypergeometric Functions
pFq is a math library that computes generalized hypergeometric functions by series approximation as well as derived functions.
The current version pushes direct series evaluation about as far as it can go without resorting to arbitrary precision floating point. Nonetheless, for many applications, the current precision may be adequate. Often, the precision exceeds the available test functions. An approach that is intended to be a significant improvement is being actively researched.