pdf

# ssyswapr.f

ssyswapr.f −

## SYNOPSIS

Functions/Subroutines

subroutine ssyswapr (UPLO, N, A, LDA, I1, I2)
SSYSWAPR
applies an elementary permutation on the rows and columns of a symmetric matrix.

## Function/Subroutine Documentation

subroutine ssyswapr (characterUPLO, integerN, real, dimension( lda, n )A, integerLDA, integerI1, integerI2)
SSYSWAPR
applies an elementary permutation on the rows and columns of a symmetric matrix.

Purpose:

SSYSWAPR 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 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

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

NAG Ltd.

Date:

September 2012

Definition at line 103 of file ssyswapr.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

pdf