# cheswapr.f - Man Page

SRC/cheswapr.f

## Synopsis

### Functions/Subroutines

subroutine cheswapr (uplo, n, a, lda, i1, i2)
CHESWAPR applies an elementary permutation on the rows and columns of a Hermitian matrix.

## Function/Subroutine Documentation

### subroutine cheswapr (character uplo, integer n, complex, dimension( lda, n ) a, integer lda, integer i1, integer i2)

CHESWAPR applies an elementary permutation on the rows and columns of a Hermitian matrix.

Purpose:

``` CHESWAPR applies an elementary permutation on the rows and the columns of
a hermitian matrix.```
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.```

N

```          N is INTEGER
The order of the matrix A.  N >= 0.```

A

```          A is COMPLEX array, dimension (LDA,N)
On entry, the NB diagonal matrix D and the multipliers
used to obtain the factor U or L as computed by CSYTRF.

On exit, if INFO = 0, the (symmetric) inverse of the original
matrix.  If UPLO = 'U', the upper triangular part of the
inverse is formed and the part of A below the diagonal is not
referenced; if UPLO = 'L' the lower triangular part of the
inverse is formed and the part of A above the diagonal is
not referenced.```

LDA

```          LDA is INTEGER
The leading dimension of the array A.  LDA >= max(1,N).```

I1

```          I1 is INTEGER
Index of the first row to swap```

I2

```          I2 is INTEGER
Index of the second row to swap```
Author

Univ. of Tennessee

Univ. of California Berkeley

NAG Ltd.

Definition at line 101 of file cheswapr.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page cheswapr(3) is an alias of cheswapr.f(3).

Tue Nov 28 2023 12:08:41 Version 3.12.0 LAPACK