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/*
This file is part of the FElt finite element analysis package.
Copyright (C) 1993-1997 Jason I. Gobat and Darren C. Atkinson
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/************************************************************************
* File: property.c
*
* Description:
*
************************************************************************/
# include <stdio.h>
# include "matrix.h"
# include "cmatrix.h"
int IsSymmetricComplexMatrix (a) /* Aij == Aji ? 1 : 0 */
ComplexMatrix a; /* matrix to check for symmetry */
{
unsigned i, j;
int status;
if (!IsSquare(a))
return 0;
status = 1;
for (i = 1 ; i <= Mrows(a) ; i++) {
for (j = i ; j <= Mcols(a) ; j++) {
if (re(cmdata(a,i,j)) != re(cmdata(a,j,i)) ||
im(cmdata(a,i,j)) != im(cmdata(a,j,i))) {
status = 0;
break;
}
}
if (!status)
break;
}
return status;
}
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