text: Returns true if mat [ N ] [ N ] is symmetric , else false
code: static boolean isSymmetric ( int mat [ ] [ ] , int N ) { int tr [ ] [ ] = new int [ N ] [ MAX ] ; transpose ( mat , tr , N ) ; for ( int i = 0 ; i < N ; i ++ ) for ( int j = 0 ; j < N ; j ++ ) if ( mat [ i ] [ j ] != tr [ i ] [ j ] ) return false ; return true ; }