tlapack/ungql_8hpp_source.html

//

// Copyright (c) 2021-2023, University of Colorado Denver. All rights reserved.

//

// This file is part of <T>LAPACK.

// <T>LAPACK is free software: you can redistribute it and/or modify it under

// the terms of the BSD 3-Clause license. See the accompanying LICENSE file.


#ifndef TLAPACK_UNGQL_HH

#define TLAPACK_UNGQL_HH


#include "tlapack/base/utils.hpp"

#include "tlapack/blas/scal.hpp"

#include "tlapack/lapack/larf.hpp"

#include "tlapack/lapack/larfb.hpp"

#include "tlapack/lapack/larft.hpp"

#include "tlapack/lapack/ungq.hpp"


namespace tlapack {


struct UngqlOpts {

    size_t nb = 32;

};


template <TLAPACK_SMATRIX matrix_t, TLAPACK_SVECTOR vector_t>


int ungql(matrix_t& A, const vector_t& tau, const UngqlOpts& opts = {})

{

    return ungq(BACKWARD, COLUMNWISE_STORAGE, A, tau, UngqOpts{opts.nb});

}


}  // namespace tlapack


#endif  // TLAPACK_UNGQL_HH

utils.hpp

scal.hpp

tlapack::ungq
int ungq(direction_t direction, storage_t storeMode, matrix_t &A, const vector_t &tau, const UngqOpts &opts={})
Generates a matrix Q that is the product of elementary reflectors.
Definition ungq.hpp:352

tlapack::ungql
int ungql(matrix_t &A, const vector_t &tau, const UngqlOpts &opts={})
Generates an m-by-n matrix Q with orthonormal columns, which is defined as the last n columns of a pr...
Definition ungql.hpp:55

larf.hpp

larfb.hpp
Applies a Householder block reflector to a matrix.

larft.hpp
Forms the triangular factor T of a block reflector.

tlapack::real_type
typename traits::real_type_traits< Types..., int >::type real_type
The common real type of the list of types.
Definition scalar_type_traits.hpp:113

tlapack::UngqlOpts
Options struct for ungql.
Definition ungql.hpp:27

tlapack::UngqlOpts::nb
size_t nb
Block size.
Definition ungql.hpp:28

ungq.hpp