Kokkos Node API and Local Linear Algebra Kernels Version of the Day
Static Public Member Functions
TSQR::CombineFortran< Scalar, is_complex > Class Template Reference

Interface to Fortran 9x back end of TSQR::Combine. More...

#include <Tsqr_CombineFortran.hpp>

List of all members.

Static Public Member Functions

static bool QR_produces_R_factor_with_nonnegative_diagonal ()
 Does the R factor have a nonnegative diagonal?

Detailed Description

template<class Scalar, bool is_complex = ScalarTraits<Scalar>::is_complex>
class TSQR::CombineFortran< Scalar, is_complex >

Interface to Fortran 9x back end of TSQR::Combine.

TSQR::Combine has three implementations: CombineDefault, CombineNative, and CombineFortran. The latter, implemented in this file, is a C++ front end to a Fortran 9x implementation. CombineFortran is not templated on the Ordinal type, because the Fortran implementation uses int for that.

Definition at line 53 of file Tsqr_CombineFortran.hpp.


Member Function Documentation

template<class Scalar , bool is_complex = ScalarTraits<Scalar>::is_complex>
static bool TSQR::CombineFortran< Scalar, is_complex >::QR_produces_R_factor_with_nonnegative_diagonal ( ) [static]

Does the R factor have a nonnegative diagonal?

CombineFortran implements a QR factorization (of a matrix with a special structure). Some, but not all, QR factorizations produce an R factor whose diagonal may include negative entries. This Boolean tells you whether CombineFortran promises to compute an R factor whose diagonal entries are all nonnegative.


The documentation for this class was generated from the following file:
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends