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 zsyconv.f(3) LAPACK zsyconv.f(3)

zsyconv.f -

# SYNOPSIS

## Functions/Subroutines

subroutine zsyconv (UPLO, WAY, N, A, LDA, IPIV, WORK, INFO)

ZSYCONV

# Function/Subroutine Documentation

## subroutine zsyconv (characterUPLO, characterWAY, integerN, complex*16, dimension( lda, * )A, integerLDA, integer, dimension( * )IPIV, complex*16, dimension( * )WORK, integerINFO)

ZSYCONV
Purpose:
``` ZSYCONV converts A given by ZHETRF into L and D or vice-versa.
Get nondiagonal elements of D (returned in workspace) and
apply or reverse permutation done in TRF.
```
Parameters:
UPLO
```          UPLO is CHARACTER*1
Specifies whether the details of the factorization are stored
as an upper or lower triangular matrix.
= 'U':  Upper triangular, form is A = U*D*U**T;
= 'L':  Lower triangular, form is A = L*D*L**T.
```
WAY
```          WAY is CHARACTER*1
= 'C': Convert
= 'R': Revert
```
N
```          N is INTEGER
The order of the matrix A.  N >= 0.
```
A
```          A is COMPLEX*16 array, dimension (LDA,N)
The block diagonal matrix D and the multipliers used to
obtain the factor U or L as computed by ZSYTRF.
```
LDA
```          LDA is INTEGER
The leading dimension of the array A.  LDA >= max(1,N).
```
IPIV
```          IPIV is INTEGER array, dimension (N)
Details of the interchanges and the block structure of D
as determined by ZSYTRF.
```
WORK
```          WORK is COMPLEX*16 array, dimension (N)
```
INFO
```          INFO is INTEGER
= 0:  successful exit
< 0:  if INFO = -i, the i-th argument had an illegal value
```
Author:
Univ. of Tennessee
Univ. of California Berkeley
NAG Ltd.
Date:
November 2011
Definition at line 113 of file zsyconv.f.

# Author

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