eigen@3 ☆

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Description:
C++ template library for linear algebra

Type: Formula | Latest Version: 3.4.1@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: c++ linear-algebra math header-only matrix

Install: brew install eigen@3

About:
Eigen is a high-level C++ library for linear algebra, providing matrix and vector operations, geometric transformations, and solvers. It leverages expression templates to achieve performance comparable to optimized libraries while maintaining a clean, abstract API. The library is header-only, requiring no compilation or installation.

Key Features:

Header-only library with no dependencies
Expression templates for lazy evaluation and optimization
Supports dense and sparse matrix operations
Provides advanced solvers (QR, SVD, eigenvalues)
Expression Template metaprogramming for vectorization

Use Cases:

Computer vision and image processing algorithms
Physics simulations and scientific computing
Robotics kinematics and control systems
Machine learning model implementations

Alternatives:

Armadillo – Matlab-like syntax, requires linking against LAPACK/BLAS for full performance
Blaze – Focuses on parallelization and high-performance computing (HPC) environments
Boost.uBLAS – Part of the Boost collection, offers standard BLAS functionality but with more verbose syntax

License: MPL-2.0 AND Apache-2.0 AND BSD-3-Clause AND Minpack AND LGPL-2.1-only

Bottles available for: all

Version History

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