csyswapr.f3
Usage
Functions/Subroutines
subroutine csyswapr (uplo, n, a, lda, i1, i2)
CSYSWAPR
Function/Subroutine Documentation
subroutine csyswapr (character uplo, integer n, complex, dimension( lda, n ) a, integer lda, integer i1, integer i2)
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
!> N is INTEGER !> The order of the matrix A. N >= 0. !>
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. !>
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.
Definition at line 99 of file csyswapr.f.
Releases
4 releases since Debian 7 (Wheezy); the text changed 3 times.