Intel® Math Kernel Library (Intel® MKL) (Doc)

 Intel® Math Kernel Library (Intel® MKL) is a computing math library of highly
 optimized, extensively threaded routines for applications that require
 maximum performance. The library provides Fortran and C programming language
 interfaces. Intel MKL C language interfaces can be called from applications
 written in either C or C++, as well as in any other language that can
 reference a C interface.
 .
 This package ships several document files, but not a complete copy of MKL doc.
 Please go to the homepage for the full documentation.
 https://software.intel.com/en-us/mkl