csyswapr-f(3)

csyswapr.f –

Synopsis

Functions/Subroutines

subroutine csyswapr (UPLO, N, A, LDA, I1, I2)
CSYSWAPR

Function/Subroutine Documentation

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

CSYSWAPR

Purpose:

 CSYSWAPR applies an elementary permutation on the rows and the columns of
 a symmetric 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 is INTEGER
 The order of the matrix A. N >= 0.

 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 is INTEGER
 Index of the first row to swap

 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:

November 2011

Definition at line 103 of file csyswapr.f.

Author

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