Announcements on Eigen: A C++ template library for linear algebra

Eigen 5.0.0 released!

Tue, 30 Sep 2025 22:36:27 +0000

Eigen 5.0.0 has been released on September 30, 2025.

Please check the release page for source archives and release notes.

Note we have switched to semantic versioning, so have dropped the “World” version 3 from the version number. Previously, Eigen used a WORLD.MAJOR.MINOR scheme. From now on, version numbers will follow the MAJOR.MINOR.PATCH format, indicating breaking changes, new features, and bug fixes, respectively. The WORLD version will remain 3 for this and subsequent releases for posterity.

Eigen 3.4.1 released!

Tue, 30 Sep 2025 21:36:27 +0000

Eigen 3.4.1 has been released on September 30, 2025.

Please check the release page for source archives and release notes.

Eigen 3.4.0 released!

Wed, 18 Aug 2021 21:36:27 +0000

Eigen 3.4.0 has been released on August 18, 2021.

Notice: that 3.4.x will be the last major release series of Eigen that will support c++03. The master branch will drop c++03 support after this release.

The source archive is available at: https://gitlab.com/libeigen/eigen/-/releases/3.4.0

Please check the release page for a list of changes.

Eigen 3.4-rc1 released!

Mon, 19 Apr 2021 11:16:50 +0000

Eigen 3.4-rc1 has been released on April 19, 2021.

Depending on the amount of reported issues, 3.4 will be released late April or early May.

The source archive is available at: https://gitlab.com/libeigen/eigen/-/releases/3.4-rc1

Please check the release page for a list of changes.

Eigen 3.3.9 released!

Fri, 04 Dec 2020 22:09:00 +0000

Eigen 3.3.9 has been released on December 4, 2020.

This is a maintenance release fixing minor bugs and compilation issues. For more details have a look at the changelog.

The sources are available at https://gitlab.com/libeigen/eigen/-/releases/3.3.9.

Eigen on Discord

Mon, 16 Nov 2020 17:19:05 +0000

Join our Discord server to discuss Eigen-related topics with other users and developers.

Eigen 3.3.8 released!

Mon, 05 Oct 2020 12:13:08 +0000

Eigen 3.3.8 has been released on October 5, 2020.

This is a maintenance release fixing minor bugs and compilation issues. For more details have a look at the changelog.

The sources are available at https://gitlab.com/libeigen/eigen/-/releases/3.3.8.

Eigen is now on GitLab.com

Thu, 30 Jul 2020 14:47:56 +0000

Since the end of 2019, Eigen’s repository and bugtracker are now both hosted on GitLab.com, meaning that Eigen is now using git for source code management.

The old mercurial repository is still readable on bitbucket.org, but it is not synchronized with the git repository, meaning that it should be used for archive purposes only. The same remark applies for the old bugzilla instance.

Migration to GitLab.com scheduled on the December 4th

Mon, 25 Nov 2019 20:41:17 +0000

Following the decision of Bitbucket.org to delete all mercurial repositories next spring, we decided to migrate to a git repository hosted on gitlab.com. We also decided to take this opportunity to migrate our self hosted bugzilla instance to gitlab.com. Both migrations are scheduled on the 4th of December, starting at 8:00 UTC, and the new project:
https://gitlab.com/libeigen/eigen
will be made public once the migration is completed.

Details on the migration process:

Our bugzilla will be made read only; all entries, comments and attachments will be transferred to gitlab.com while keeping the same bug IDs.
https://bitbucket.org/eigen/eigen will be unavailable and replaced by an empty project pointing to https://gitlab.com/libeigen/eigen
The old mercurial repository will still be readable on eigen.tuxfamily.org but with no updates.
Existing pull-requests will be archived as static pages hosted on eigen.tuxfamily.org
The official git mirror (https://github.com/eigenteam/eigen-git-mirror) will be kept as it is for a few months with no updates until we eventually replace it by an empty project pointing to https://gitlab.com/libeigen/eigen. (it cannot be synchronised because of hash differences)

Eigen 3.3.7 released!

Tue, 11 Dec 2018 19:24:35 +0000

Eigen 3.3.7 has been released on December 11, 2018.

This is a maintenance release fixing a compilation issue introduced in the previous 3.3.6 release. The compilation issue only occurred for some versions of GCC with compiler optimization turned off.

The source archive is at https://gitlab.com/libeigen/eigen/-/archive/3.3.7/eigen-3.3.7.tar.bz2 .

Eigen 3.3.6 released!

Mon, 10 Dec 2018 13:50:59 +0000

Eigen 3.3.6 has been released on December 10, 2018.

This is a maintenance release fixing several minor bugs and compilations issues. For more details, look at the Changelog.

The source archive is at https://gitlab.com/libeigen/eigen/-/archive/3.3.6/eigen-3.3.6.tar.bz2 .

We plan a beta1 release of the next Eigen 3.4 within the next few days, stay tuned!

Eigen 3.3.5 released!

Mon, 23 Jul 2018 09:36:30 +0000

Eigen 3.3.5 has been released on July 23, 2018.

This is a maintenance release fixing several minor bugs and compilations issues. For more details, look at the Changelog.

The source archive is at https://gitlab.com/libeigen/eigen/-/archive/3.3.5/eigen-3.3.5.tar.bz2 .

Eigen now offers a git mirror on github!

Fri, 29 Dec 2017 17:27:46 +0000

Git users can now clone Eigen through git or import it as submodule: https://github.com/eigenteam/eigen-git-mirror.

Eigen 3.3.4 released!

Thu, 15 Jun 2017 07:11:31 +0000

Eigen 3.3.4 has been released on June 15, 2017.

This is a maintenance release fixing a few regressions and other issues. For more details, look at the Changelog.

The source archive is at https://gitlab.com/libeigen/eigen/-/archive/3.3.4/eigen-3.3.4.tar.bz2 .

Eigen 3.3.3 released!

Tue, 21 Feb 2017 13:40:28 +0000

Eigen 3.3.3 has been released on February 21, 2017.

This is a maintenance release fixing a few regressions and other issues. For more details, look at the Changelog.

The source archive is at https://gitlab.com/libeigen/eigen/-/archive/3.3.3/eigen-3.3.3.tar.bz2 .

Eigen 3.3.2 released!

Wed, 18 Jan 2017 14:12:31 +0000

Eigen 3.3.2 has been released on January 18, 2017.

This is a maintenance release with few fixes of compilation and performance regressions, some doxygen documentation improvements, and the addition of transpose, adjoint, conjugate methods to SelfAdjointView to ease writing generic code. For more details, look at the Changelog.

The source archive is at https://gitlab.com/libeigen/eigen/-/archive/3.3.2/eigen-3.3.2.tar.bz2 .

Eigen 3.3.1 released!

Tue, 06 Dec 2016 10:48:23 +0000

Eigen 3.3.1 has been released on December 06, 2016.

This is a maintenance release with few bug fixes and performance regressions since the first release of the 3.3 series. This release also includes better cmake support (imported targets, relocatable package). For more details, look at the Changelog.

The source archive is at https://gitlab.com/libeigen/eigen/-/archive/3.3.1/eigen-3.3.1.tar.bz2 .

Eigen 3.3 released!

Thu, 10 Nov 2016 13:17:36 +0000

After more than three years of efforts, Eigen 3.3 has been released on November 10, 2016.

Since Eigen 3.2, the 3.3 version leverage numerous major novel features and improvements that are summarized in the dedicated 3.3 release page.

Those include, a novel evaluation mechanism of expressions, support for AVX, FMA, AVX512, VSX and ZVector vector instructions, unaligned vectorization, nvcc/CUDA, more OpenMP parallelism, a fast divide and conquer SVD algorithm, a CompleteOrthogonalDecomposition class for fast minimal norm solving, a LS-CG solver, a fast reciprocal condition number estimators in LU and Cholesky factorizations, LU::transpose()/adjoint() API, support for inplace decompositions, support for matrix-free iterative solvers, new array functions, support for any BLAS/LAPACK libraries as backend, improved support for mixing scalar types, eigenvectors in GeneralizedEigenSolver, a complete rewrite of LinSpaced, a non officially supported but massively used Tensor module with CUDA and OpenCL support, and more.

Eigen 3.3-alpha1 released!

Thu, 10 Nov 2016 12:43:20 +0000

Eigen 3.3-alpha1 has been released on September 4, 2015.

The source archive is at: https://gitlab.com/libeigen/eigen/-/archive/3.3-alpha1/eigen-3.3-alpha1.tar.bz2

This alpha version introduces a novel evaluation mechanism of expressions, as well as numerous exciting features such as fast divide and conquer SVD, support for AVX and VSX vector instructions, more OpenMP parallelism, a LS-CG solver, and more. Check the page dedicated on the 3.3 release for a comprehensive review of the novelties and improvements.

As for any alpha and beta release, everybody is invited to test this release on their own basecode and report any compilation issue or performance regression on the bugtracker.

Eigen 3.3-rc2 released!

Fri, 04 Nov 2016 08:13:40 +0000

Eigen 3.3-rc2 has been released on November 4, 2016.

The source archive is at: https://gitlab.com/libeigen/eigen/-/archive/3.3-rc2/eigen-3.3-rc2.tar.bz2

Since 3.3-rc1, this release introduces support for AVX512 and a complete rewrite of LinSpaced to leverage more numerical robustness and consistencies for real and integer scalar types. It also includes a few regression fixes and documentation improvements.

Announcements on Eigen: A C++ template library for linear algebra

Eigen 5.0.0 released!

Eigen 3.4.1 released!

Eigen 3.4.0 released!

Eigen 3.4-rc1 released!

Eigen 3.3.9 released!

Eigen on Discord

Eigen 3.3.8 released!

Eigen is now on GitLab.com

Migration to GitLab.com scheduled on the December 4th

Eigen 3.3.7 released!

Eigen 3.3.6 released!

Eigen 3.3.5 released!

Eigen now offers a git mirror on github!

Eigen 3.3.4 released!

Eigen 3.3.3 released!

Eigen 3.3.2 released!

Eigen 3.3.1 released!

Eigen 3.3 released!

Eigen 3.3-alpha1 released!

Eigen 3.3-rc2 released!

Eigen 3.2.10 released!

Eigen 3.3-rc1 released!

Eigen3.3-beta2 released!

Eigen 3.2.9 released!

Eigen 3.2.8 released!

Eigen3.3-beta1 released!

Eigen 3.2.7 released!

Eigen 3.2.6 released!

Eigen 3.2.5 released!

Eigen 3.2.4 released!

Eigen 3.2.3 released!

Eigen 3.2.2 released!

Eigen 3.2.1 released!

Eigen 3.1.4 & 3.0.7 released!

Eigen 3.2 released!

Eigen 3.2-rc2 released!

Eigen 3.2-rc1 released!

Eigen received the SGP software award!

Eigen 3.1.3 released!

Eigen course at CG libs

Eigen 3.2.0-beta1 released!

Eigen 3.1.2 released!

Eigen 3.1.1 released!

Relicensed to MPL2!

Eigen 3.0.6 released!

Relicensing to MPL2!

Eigen 3.1 released!

Eigen 3.1.0-rc2 released!

Eigen 3.1.0-rc1 released!

Eigen 3.1.0-beta1 released!

Eigen 3.0.5 released!

Eigen 3.1.0-alpha2 released with support for Intel MKL!

Eigen 3.1.0-alpha1 released!

Eigen 3.0.4 released!

Eigen 2.0.17 released!

Eigen 3.0.3 released!

Eigen 3.0.2 released!

Eigen 3.0.1 released!

Eigen 2.0.16 released!

Eigen 3.0.0 released!

Eigen 2.0.15 released!