198 …void initFrancisQRStep(Index il, Index iu, const Vector3s& shiftInfo, Index& im, Vector3s& firstHo…
199 …void performFrancisQRStep(Index il, Index im, Index iu, bool computeU, const Vector3s& firstHouseh…
255         Index im;  in compute()  local
256         initFrancisQRStep(il, iu, shiftInfo, im, firstHouseholderVector);  in compute()
257         performFrancisQRStep(il, im, iu, computeU, firstHouseholderVector, workspace);  in compute()
377 …>::initFrancisQRStep(Index il, Index iu, const Vector3s& shiftInfo, Index& im, Vector3s& firstHous…  in initFrancisQRStep()  argument
381   for (im = iu-2; im >= il; --im)  in initFrancisQRStep()
383     const Scalar Tmm = m_matT.coeff(im,im);  in initFrancisQRStep()
386     v.coeffRef(0) = (r * s - shiftInfo.coeff(2)) / m_matT.coeff(im+1,im) + m_matT.coeff(im,im+1);  in initFrancisQRStep()
387     v.coeffRef(1) = m_matT.coeff(im+1,im+1) - Tmm - r - s;  in initFrancisQRStep()
388     v.coeffRef(2) = m_matT.coeff(im+2,im+1);  in initFrancisQRStep()
389     if (im == il) {  in initFrancisQRStep()
392 …const Scalar lhs = m_matT.coeff(im,im-1) * (internal::abs(v.coeff(1)) + internal::abs(v.coeff(2)));  in initFrancisQRStep()
393 … v.coeff(0) * (internal::abs(m_matT.coeff(im-1,im-1)) + internal::abs(Tmm) + internal::abs(m_matT.…  in initFrancisQRStep()
403 inline void RealSchur<MatrixType>::performFrancisQRStep(Index il, Index im, Index iu, bool computeU…  in performFrancisQRStep()  argument
405   assert(im >= il);  in performFrancisQRStep()
406   assert(im <= iu-2);  in performFrancisQRStep()
410   for (Index k = im; k <= iu-2; ++k)  in performFrancisQRStep()
412     bool firstIteration = (k == im);  in performFrancisQRStep()
454   for (Index i = im+2; i <= iu; ++i)  in performFrancisQRStep()
457     if (i > im+2)  in performFrancisQRStep()