diff options
| -rw-r--r-- | Eigen/src/SparseQR/SparseQR.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Eigen/src/SparseQR/SparseQR.h b/Eigen/src/SparseQR/SparseQR.h index 7409fcae9..1a28389e8 100644 --- a/Eigen/src/SparseQR/SparseQR.h +++ b/Eigen/src/SparseQR/SparseQR.h @@ -640,7 +640,8 @@ struct SparseQR_QProduct : ReturnByValue<SparseQR_QProduct<SparseQRType, Derived // Compute res = Q * other column by column for(Index j = 0; j < res.cols(); j++) { - for (Index k = diagSize-1; k >=0; k--) + Index start_k = internal::is_identity<Derived>::value ? numext::mini(j,diagSize-1) : diagSize-1; + for (Index k = start_k; k >=0; k--) { Scalar tau = Scalar(0); tau = m_qr.m_Q.col(k).dot(res.col(j)); |