Hypergeometric functions are described in Abramowitz & Stegun, Chapters 13 and 15. These functions are declared in the header file `gsl_sf_hyperg.h'.
gsl_sf_result_e10
type to return a result with extended range.
gsl_sf_result_e10
type to return a
result with extended range.
If the arguments (a,b,c,x) are too close to a singularity then
the function can return the error code GSL_EMAXITER
when the
series approximation converges too slowly. This occurs in the region of
x=1, c - a - b = m for integer m.