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# NAME

zla_porcond_c.f -

# SYNOPSIS

## Functions/Subroutines

DOUBLE PRECISION function zla_porcond_c (UPLO, N, A, LDA, AF, LDAF, C, CAPPLY, INFO, WORK, RWORK)

ZLA_PORCOND_C computes the infinity norm condition number of op(A)*inv(diag(c)) for Hermitian positive-definite matrices.

# Function/Subroutine Documentation

## DOUBLE PRECISION function zla_porcond_c (characterUPLO, integerN, complex*16, dimension( lda, * )A, integerLDA, complex*16, dimension( ldaf, * )AF, integerLDAF, double precision, dimension( * )C, logicalCAPPLY, integerINFO, complex*16, dimension( * )WORK, double precision, dimension( * )RWORK)

ZLA_PORCOND_C computes the infinity norm condition number of op(A)*inv(diag(c)) for Hermitian positive-definite matrices.
Purpose:
```    ZLA_PORCOND_C Computes the infinity norm condition number of
op(A) * inv(diag(C)) where C is a DOUBLE PRECISION 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).
```
C
```          C is DOUBLE PRECISION array, dimension (N)
The vector C in the formula op(A) * inv(diag(C)).
```
CAPPLY
```          CAPPLY is LOGICAL
If .TRUE. then access the vector C in the formula above.
```
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
NAG Ltd.
Date:
September 2012
Definition at line 131 of file zla_porcond_c.f.

# Author

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