News:Eigen 3.1.0-alpha1 released!
Eigen 3.1.0-alpha1 has been released on December 6, 2011.
The source archive is at: http://bitbucket.org/eigen/eigen/get/3.1.0-alpha1.tar.bz2
This alpha version of the future 3.1 finally brings to live a set of official sparse modules for the representation, assembly, and solving of sparse problems. A quick overview can be found in the manual while the changelog contains some details on the main differences with the unstable 3.0 sparse modules.
This alpha release also features closed-form algorithms for small eigenvalue problems, Cholesky updates/downdates, new coefficient-wise and vector-wise operators, as well as some performance and memory optimizations (for reductions and JacobiSVD respectively).