dla_gerfsx_extended (l) - Linux Manuals

dla_gerfsx_extended: computes ..

NAME

DLA_GERFSX_EXTENDED - computes ..

SYNOPSIS

SUBROUTINE DLA_GERFSX_EXTENDED(
PREC_TYPE, TRANS_TYPE, N, NRHS, A, LDA, AF, LDAF, IPIV, COLEQU, C, B, LDB, Y, LDY, BERR_OUT, N_NORMS, ERRS_N, ERRS_C, RES, AYB, DY, Y_TAIL, RCOND, ITHRESH, RTHRESH, DZ_UB, IGNORE_CWISE, INFO )

    
IMPLICIT NONE

    
INTEGER INFO, LDA, LDAF, LDB, LDY, N, NRHS, PREC_TYPE, TRANS_TYPE, N_NORMS, ITHRESH

    
LOGICAL COLEQU, IGNORE_CWISE

    
DOUBLE PRECISION RTHRESH, DZ_UB

    
INTEGER IPIV( * )

    
DOUBLE PRECISION A( LDA, * ), AF( LDAF, * ), B( LDB, * ), Y( LDY, * ), RES( * ), DY( * ), Y_TAIL( * )

    
DOUBLE PRECISION C( * ), AYB( * ), RCOND, BERR_OUT( * ), ERRS_N( NRHS, * ), ERRS_C( NRHS, * )

PURPOSE

DLA_GERFSX_EXTENDED computes ... .

ARGUMENTS

Pages related to dla_gerfsx_extended

  • dla_gerfsx_extended (3)
  • dla_gercond (l) - DLA_GERCOND estimate the Skeel condition number of op(A) * op2(C) where op2 is determined by CMODE as follows CMODE = 1 op2(C) = C CMODE = 0 op2(C) = I CMODE = -1 op2(C) = inv(C) The Skeel condition number cond(A) = norminf( |inv(A)||A| ) is computed by computing scaling factors R such that diag(R)*A*op2(C) is row equilibrated and computing the standard infinity-norm condition number
  • dla_geamv (l) - performs one of the matrix-vector operations y := alpha*abs(A)*abs(x) + beta*abs(y),
  • dla_gbamv (l) - performs one of the matrix-vector operations y := alpha*abs(A)*abs(x) + beta*abs(y),
  • dla_gbrcond (l) - DLA_GERCOND Estimate the Skeel condition number of op(A) * op2(C) where op2 is determined by CMODE as follows CMODE = 1 op2(C) = C CMODE = 0 op2(C) = I CMODE = -1 op2(C) = inv(C) The Skeel condition number cond(A) = norminf( |inv(A)||A| ) is computed by computing scaling factors R such that diag(R)*A*op2(C) is row equilibrated and computing the standard infinity-norm condition number
  • dla_gbrfsx_extended (l) - computes ..
  • dla_lin_berr (l) - DLA_LIN_BERR compute component-wise relative backward error from the formula max(i) ( abs(R(i)) / ( abs(op(A_s))*abs(Y) + abs(B_s) )(i) ) where abs(Z) is the component-wise absolute value of the matrix or vector Z
  • dla_porcond (l) - DLA_PORCOND Estimate the Skeel condition number of op(A) * op2(C) where op2 is determined by CMODE as follows CMODE = 1 op2(C) = C CMODE = 0 op2(C) = I CMODE = -1 op2(C) = inv(C) The Skeel condition number cond(A) = norminf( |inv(A)||A| ) is computed by computing scaling factors R such that diag(R)*A*op2(C) is row equilibrated and computing the standard infinity-norm condition number