Function rgsl::linear_algebra::QR_QTmat

pub fn QR_QTmat(qr: &MatrixF64, tau: &VectorF64, v: &mut MatrixF64) -> Value

This function applies the matrix Q^T encoded in the decomposition (QR,tau) to the matrix A, storing the result Q^T A in A. The matrix multiplication is carried out directly using the encoding of the Householder vectors without needing to form the full matrix Q^T.