cheswapr.f (3) Linux Manual Page

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 (characterUPLO, integerN, complex, dimension( lda, n )A, integerLDA, integerI1, integerI2)

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

Univ. of Colorado Denver

NAG Ltd.

Date:

September 2012

Definition at line 103 of file cheswapr.f.

Author

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