DLA_LIN_BERR(3) 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.

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