Created attachment 462 [details] Small C++ program reproducing the bug I am running on Ubuntu 12.04.4. Using Eigen 3.2.1 and current trunk (4a429f5e0483) the computation of a determinant using the SparseLU module is broken for my small test case. Given the Matrix: 2 -1 -1 2 SuperLU::absDeterminant() computes 2, where the expected output should be 3. Solving linear equations using SuperLU::solve works without problems. I investigated as far as MappedSuperNodalMatrix::InnerIterator, which seem to skip the last diagonal entries, as m_rowind(_colptr) does not have an appropriate entry: m_nzval_colptr 0 2 4 m_nzval 2 -0.5 -1 -1.5 m_rowind_colptr 0 2 2 m_rowind 0 1 1 I have attached a small test case that reproduces the problem. Addendum: make check on trunk produces three failures for me: 362 - eigensolver_generic_2 (OTHER_FAULT) 622 - mpreal_support (OTHER_FAULT) 651 - levenberg_marquardt (OTHER_FAULT)
Fixed: https://bitbucket.org/eigen/eigen/commits/0e64f7b3e7d7/ https://bitbucket.org/eigen/eigen/commits/cd870bd62527/
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