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LAPACK-3

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LAPACK-3: ZLA_PORCOND_C Compute the infinity norm condition number of op(A) * inv(diag(C)) where C is a DOUBLE PRECISION vector

NAME

LAPACK-3 - ZLA_PORCOND_C Compute the infinity norm condition number of op(A) * inv(diag(C)) where C is a DOUBLE PRECISION vector Arguments ========= UPLO (input) CHARACTER*1 = 'U'
SYNOPSIS
DOUBLE PRECISION FUNCTION ZLA_PORCOND_C( UPLO, N, A, LDA, AF, LDAF, C, CAPPLY, INFO, WORK, RWORK ) IMPLICIT NONE CHARACTER UPLO LOGICAL CAPPLY INTEGER N, LDA, LDAF, INFO COMPLEX*16 A( LDA, * ), AF( LDAF, * ), WORK( * ) DOUBLE PRECISION C( * ), RWORK( * )
PURPOSE
ZLA_PORCOND_C Computes the infinity norm condition number of op(A) * inv(diag(C)) where C is a DOUBLE PRECISION vector = 'L': Lower triangle of A is stored. N (input) INTEGER The number of linear equations, i.e., the order of the matrix A. N >= 0. A (input) COMPLEX*16 array, dimension (LDA,N) On entry, the N-by-N matrix A LDA (input) INTEGER The leading dimension of the array A. LDA >= max(1,N). AF (input) COMPLEX*16 array, dimension (LDAF,N) The triangular factor U or L from the Cholesky factorization A = U**T*U or A = L*L**T, as computed by ZPOTRF. LDAF (input) INTEGER The leading dimension of the array AF. LDAF >= max(1,N). C (input) DOUBLE PRECISION array, dimension (N) The vector C in the formula op(A) * inv(diag(C)). CAPPLY (input) LOGICAL If .TRUE. then access the vector C in the formula above. INFO (output) INTEGER = 0: Successful exit. i > 0: The ith argument is invalid. WORK (input) COMPLEX*16 array, dimension (2*N). Workspace. RWORK (input) DOUBLE PRECISION array, dimension (N). Workspace. LAPACK routine (version 3.2.1)March 2011 LAPACK-3(3)
 
 
 

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