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zla_porcond_x.f(3) LAPACK zla_porcond_x.f(3)

NAME

zla_porcond_x.f -

SYNOPSIS

Functions/Subroutines


DOUBLE PRECISION function zla_porcond_x (UPLO, N, A, LDA, AF, LDAF, X, INFO, WORK, RWORK)
 
ZLA_PORCOND_X

Function/Subroutine Documentation

DOUBLE PRECISION function zla_porcond_x (characterUPLO, integerN, complex*16, dimension( lda, * )A, integerLDA, complex*16, dimension( ldaf, * )AF, integerLDAF, complex*16, dimension( * )X, integerINFO, complex*16, dimension( * )WORK, double precision, dimension( * )RWORK)

ZLA_PORCOND_X
Purpose:
 
    ZLA_PORCOND_X Computes the infinity norm condition number of
    op(A) * diag(X) where X is a COMPLEX*16 vector.
 
Parameters:
UPLO 
          UPLO is CHARACTER*1
       = 'U':  Upper triangle of A is stored;
       = 'L':  Lower triangle of A is stored.
 
N 
          N is INTEGER
     The number of linear equations, i.e., the order of the
     matrix A.  N >= 0.
 
A 
          A is COMPLEX*16 array, dimension (LDA,N)
     On entry, the N-by-N matrix A.
 
LDA 
          LDA is INTEGER
     The leading dimension of the array A.  LDA >= max(1,N).
 
AF 
          AF is COMPLEX*16 array, dimension (LDAF,N)
     The triangular factor U or L from the Cholesky factorization
     A = U**H*U or A = L*L**H, as computed by ZPOTRF.
 
LDAF 
          LDAF is INTEGER
     The leading dimension of the array AF.  LDAF >= max(1,N).
 
X 
          X is COMPLEX*16 array, dimension (N)
     The vector X in the formula op(A) * diag(X).
 
INFO 
          INFO is INTEGER
       = 0:  Successful exit.
     i > 0:  The ith argument is invalid.
 
WORK 
          WORK is COMPLEX*16 array, dimension (2*N).
     Workspace.
 
RWORK 
          RWORK is DOUBLE PRECISION array, dimension (N).
     Workspace.
 
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
 
Definition at line 124 of file zla_porcond_x.f.

Author

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