The sources in here are 
Copyright 1984 - 1992 by Stephen L. Moshier

The primary documentation for the library functions
is the book by Moshier, Methods and Programs for Mathematical
Functions, Prentice-Hall, 1989.

See http://www.netlib.org/cephes/

Some slight modifications made by Allin Cottrell for use with
gretl, but no changes to the substance of the code.  A few
symbols have been renamed with the prefix cephes_ to avoid
colliding with symbols exported by other libraries.

