Vector3d v1 = new Vector3d(1, 2, 3); Vector3d v2 = new Vector3d(4, 5, 6); Matrix3d m1 = new Matrix3d(1, 2, 3, 4, 5, 6, 7, 8, 9); Matrix3d m2 = new Matrix3d(9, 8, 7, 6, 5, 4, 3, 2, 1);