gsl: GSL (GNU Scientific Library) gsl: gsl: The GNU Scientific Library (GSL) is a collection of routines for gsl: numerical computing. The routines are written from scratch by the gsl: GSL team in ANSI C, and present a modern API for C programmers gsl: while allowing wrappers to be written for very high-level gsl: languages. gsl: gsl: gsl: gsl: