Kokkos Node API and Local Linear Algebra Kernels Version of the Day

Interface to Fortran 9x back end of TSQR::Combine
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#include <Tsqr_CombineFortran.hpp>
Static Public Member Functions  
static bool  QR_produces_R_factor_with_nonnegative_diagonal () 
Does the R factor have a nonnegative diagonal? 
Interface to Fortran 9x back end of TSQR::Combine
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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 66 of file Tsqr_CombineFortran.hpp.
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.