GNU Scientific Library (GSL) -- library package The GNU Scientific Library (GSL) is a collection of routines for numerical analysis. The routines are written from scratch by the GSL team in C, and present a modern API for C programmers, while allowing wrappers to be written for very high level languages. GSL includes data types and routines for complex numbers, vectors, matrices, basic linear algebra subroutines (BLAS), eigensystems, simulated annealing, minimization, root finding, pseudo-random numbers, least-squares fitting, fast Fourier transforms (FFT), differential equations, quadrature, Monte Carlo integration, special functions, physical constants, and much more. This package provides the shared libraries required to run programs compiled with GNU GSL. To compile your own programs you also need to install libgsl0-dev.