Eigen (C++ library)

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Eigen Silly Professor 135x135.png
  • Benoît Jacob
  • Gaël Guennebaud
Stable release
3.3.5 / 23 July 2018 (48 days ago) (2018-07-23)
Written in C++
Operating system Cross-platform
Type Library
License MPL2
Website eigen.tuxfamily.org

Eigen is a high-level C++ library of template headers for linear algebra, matrix and vector operations, geometrical transformations, numerical solvers and related algorithms. Eigen is an open source library licensed under MPL2 starting from version 3.1.1. Earlier versions were licensed under LGPL3+.[1]

Eigen is implemented using the expression templates metaprogramming technique, meaning it builds expression trees at compile time and generates custom code to evaluate these. Using expression templates and a cost model of floating point operations, the library performs its own loop unrolling and vectorization.[2]

See also[edit]


  1. ^ "Eigen License". tuxfamily.org. Retrieved 16 Jan 2016. 
  2. ^ Guennebaud, Gaël (2013). Eigen: A C++ linear algebra library (PDF). Eurographics/CGLibs.