This suite of C language elementary functions offers support for not-a-number (NaN) and infinity rules, subnormal numbers, and minus zero as described by IEEE standard 754 and the Numerical C Extensions Group (NCEG). For a variety of reasons, many computers cannot take advantage of these features. You can disable any or all of them by removing the corresponding preprocessor macros. Check the files mconf.h and const.c carefully to be sure they are appropriate for your system. ------------------------------------------ http://www.netlib.org/cephes/readme Some software in this archive may be from the book _Methods and Programs for Mathematical Functions_ (Prentice-Hall or Simon & Schuster International, 1989) or from the Cephes Mathematical Library, a commercial product. In either event, it is copyrighted by the author. What you see here may be used freely but it comes with no support or guarantee. The two known misprints in the book are repaired here in the source listings for the gamma function and the incomplete beta integral. Stephen L. Moshier moshier@na-net.ornl.gov