Function Dune::XT::LA::apply_q_from_qr

template<Common::Transpose transpose, class MatrixType, class VectorType, class SecondVectorType, class ThirdVectorType>
void Dune::XT::LA::apply_q_from_qr(const MatrixType &QR, const VectorType &tau, const SecondVectorType &x, ThirdVectorType &y)

Computes y = Q * x (or y = Q^T * x) from the compressed QR factorization stored in QR and tau.