public double normSq() {
		double total = 0;
		int N = getDimension();
		for( int i = 0; i < N; i++ ) {
			double a = getIdx( i );
			total += a * a;
		}

		return total;
	}
public double normSq ( ) { double total = 0 ; int N = getDimension ( ) ; for ( int i = 0 ; i < N ; i ++ ) { double a = getIdx ( i ) ; total += a * a ; } return total ; }
Computes the square of the Euclidean norm.

@return norm squared.