SSYSWAPR
Purpose
SSYSWAPR applies an elementary permutation on the rows and the columns of
a symmetric matrix.
a symmetric matrix.
Arguments
| UPLO |
(input) 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 |
(input) INTEGER
The order of the matrix A. N >= 0.
|
| A |
(input/output) REAL 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 SSYTRF. 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 |
(input) INTEGER
The leading dimension of the array A. LDA >= max(1,N).
|
| I1 |
(input) INTEGER
Index of the first row to swap
|
| I2 |
(input) INTEGER
Index of the second row to swap
|