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|static bool||QR_produces_R_factor_with_nonnegative_diagonal ()|
Interface to Fortran 2003 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 2003 implementation. CombineFortran is not templated on the Ordinal type, because the Fortran implementation uses int for that.
|static bool TSQR::CombineFortran< Scalar, is_complex >::QR_produces_R_factor_with_nonnegative_diagonal||(||)||
Whether or not the QR factorizations computed by methods of this class produce an R factor with all nonnegative diagonal entries.