GitHub-Proxy/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2025-10-12 08:01:29 +08:00
Code Issues Packages Projects Releases Wiki Activity

Fix real schur exceptional shift

Browse Source
This commit is contained in:
Mark Shachkov 2025-09-22 15:57:14 +00:00 committed by Rasmus Munk Larsen
parent 4ac3e71f77
commit d38d669fdb
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Eigen/src/Eigenvalues/RealSchur.h
View File

@ -409,7 +409,7 @@ inline void RealSchur<MatrixType>::computeShift(Index iu, Index iter, Scalar& ex
shiftInfo.coeffRef(2) = m_matT.coeff(iu, iu - 1) * m_matT.coeff(iu - 1, iu); shiftInfo.coeffRef(2) = m_matT.coeff(iu, iu - 1) * m_matT.coeff(iu - 1, iu);
// Alternate exceptional shifting strategy every 16 iterations. // Alternate exceptional shifting strategy every 16 iterations.
if (iter % 16 == 0) { if (iter > 0 && iter % 16 == 0) {
// Wilkinson's original ad hoc shift // Wilkinson's original ad hoc shift
if (iter % 32 != 0) { if (iter % 32 != 0) {
exshift += shiftInfo.coeff(0); exshift += shiftInfo.coeff(0);