public static double[] sqrt(double[] A) {
		double[] d = new double[A.length];
		for (int i = 0; i < d.length; i++) {
			d[i] = Math.sqrt(A[i]);
		}
		return d;
	}
public static double [ ] sqrt ( double [ ] A ) { double [ ] d = new double [ A . length ] ; for ( int i = 0 ; i < d . length ; i ++ ) { d [ i ] = Math . sqrt ( A [ i ] ) ; } return d ; }
@param A
@return