sla_porcond (l)  Linux Manuals
sla_porcond: SLA_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 infinitynorm condition number
NAME
SLA_PORCOND  SLA_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 infinitynorm condition numberSYNOPSIS
 REAL FUNCTION
 SLA_PORCOND( UPLO, N, A, LDA, AF, LDAF, CMODE, C, INFO, WORK, IWORK )
 IMPLICIT NONE
 CHARACTER UPLO
 INTEGER N, LDA, LDAF, INFO, CMODE
 REAL A( LDA, * ), AF( LDAF, * ), WORK( * ), C( * )
 INTEGER IWORK( * )
PURPOSE
SLA_PORCOND Estimates the Skeel condition number of
where op2 is determined by CMODE as follows
CMODE
CMODE
CMODE
The Skeel condition number
is computed by computing scaling factors R such that
diag(R)*A*op2(C)
infinitynorm condition number.
ARGUMENTS
 WORK real workspace of size 3*N, and
 IWORK integer workspace of size N.
