public double norm1()
    {
        double f = 0;
        for (int j = 0; j < n; j++)
        {
            double s = 0;
            for (int i = 0; i < m; i++)
            {
                s += Math.abs(A[i][j]);
            }
            f = Math.max(f, s);
        }
        return f;
    }
public double norm1 ( ) { double f = 0 ; for ( int j = 0 ; j < n ; j ++ ) { double s = 0 ; for ( int i = 0 ; i < m ; i ++ ) { s += Math . abs ( A [ i ] [ j ] ) ; } f = Math . max ( f , s ) ; } return f ; }
One norm

@return maximum column sum.