GNU科学计算函数库GSL（GNU Scientific Library）是一个强大的C/C++数值计算函数库，它是一个自由软件，是GNU项目软件的一个部分，遵循GPL协议。GSL是一个为C和C++程序员提供的科学数值运算库。该科学计算库异常强大，函数库提供了大量的数值计算程序，如随机函数、特殊函数和拟合函数等等，整个函数库大约有1000多个函数，几乎涵盖了科学计算的各个方面。(The GNU scientific computing function library GSL (GNU Scientific Library) is a powerful C/C++ numeric function library. It is a free software, a part of the GNU project software, and follows the GPL protocol. GSL is a scientific numerical library for C and C++ programmers. The library is very powerful, and the function library provides a large number of numerical computing programs, such as random functions, special functions and fitting functions, and so on. The whole function library has about more than 1000 functions, which almost covers all aspects of scientific computing.)