csyswapr()

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

CSYSWAPR

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Purpose:

!>
!> CSYSWAPR applies an elementary permutation on the rows and the columns of
!> a symmetric matrix.
!> 

Parameters

[in]	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. !>
[in]	N	!> N is INTEGER !> The order of the matrix A. N >= 0. !>
[in,out]	A	!> A is COMPLEX array, dimension (LDA,N) !> On entry, the N-by-N matrix A. On exit, the permuted matrix !> where the rows I1 and I2 and columns I1 and I2 are interchanged. !> If UPLO = 'U', the interchanges are applied to the upper !> triangular part and the strictly lower triangular part of A is !> not referenced; if UPLO = 'L', the interchanges are applied to !> the lower triangular part and the part of A above the diagonal !> is not referenced. !>
[in]	LDA	!> LDA is INTEGER !> The leading dimension of the array A. LDA >= max(1,N). !>
[in]	I1	!> I1 is INTEGER !> Index of the first row to swap !>
[in]	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.