NAME¶

CLA_LIN_BERR - CLA_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 CLA_LIN_BERR

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

IMPLICIT NONE INTEGER N, NZ, NRHS REAL AYB( N, NRHS ), BERR( NRHS ) COMPLEX RES( N, NRHS )

PURPOSE¶

CLA_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.