dla_lin_berr (l) - Linux Manuals

dla_lin_berr: 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

NAME

DLA_LIN_BERR - 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

SYNOPSIS

SUBROUTINE DLA_LIN_BERR

( N, NZ, NRHS, RES, AYB, BERR )

    

IMPLICIT NONE

    

INTEGER N, NZ, NRHS

    

DOUBLE PRECISION AYB( N, NRHS ), BERR( NRHS )

    

DOUBLE PRECISION RES( N, NRHS )

PURPOSE

DLA_LIN_BERR computes 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.