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## NAMEzla_gbrfsx_extended.f - ## SYNOPSISFunctions/Subroutines subroutine zla_gbrfsx_extended (PREC_TYPE, TRANS_TYPE, N, KL, KU, NRHS, AB, LDAB, AFB, LDAFB, IPIV, COLEQU, C, B, LDB, Y, LDY, BERR_OUT, N_NORMS, ERR_BNDS_NORM, ERR_BNDS_COMP, RES, AYB, DY, Y_TAIL, RCOND, ITHRESH, RTHRESH, DZ_UB, IGNORE_CWISE, INFO) ZLA_GBRFSX_EXTENDED ## Function/Subroutine Documentationsubroutine zla_gbrfsx_extended (integerPREC_TYPE, integerTRANS_TYPE, integerN, integerKL, integerKU, integerNRHS, complex*16, dimension( ldab, * )AB, integerLDAB, complex*16, dimension( ldafb, * )AFB, integerLDAFB, integer, dimension( * )IPIV, logicalCOLEQU, double precision, dimension( * )C, complex*16, dimension( ldb, * )B, integerLDB, complex*16, dimension( ldy, * )Y, integerLDY, double precision, dimension( * )BERR_OUT, integerN_NORMS, double precision, dimension( nrhs, * )ERR_BNDS_NORM, double precision, dimension( nrhs, * )ERR_BNDS_COMP, complex*16, dimension( * )RES, double precision, dimension(*)AYB, complex*16, dimension( * )DY, complex*16, dimension( * )Y_TAIL, double precisionRCOND, integerITHRESH, double precisionRTHRESH, double precisionDZ_UB, logicalIGNORE_CWISE, integerINFO) ZLA_GBRFSX_EXTENDED improves the computed solution to a system of linear equations for general banded matrices by performing extra- precise iterative refinement and provides error bounds and backward error estimates for the solution. Purpose: ZLA_GBRFSX_EXTENDED improves the computed solution to a system of linear equations by performing extra-precise iterative refinement and provides error bounds and backward error estimates for the solution. This subroutine is called by ZGBRFSX to perform iterative refinement. In addition to normwise error bound, the code provides maximum componentwise error bound if possible. See comments for ERR_BNDS_NORM and ERR_BNDS_COMP for details of the error bounds. Note that this subroutine is only resonsible for setting the second fields of ERR_BNDS_NORM and ERR_BNDS_COMP. Parameters: ## AuthorGenerated automatically by Doxygen for LAPACK from the source code. |

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