@Test
public void testGetImagEigenvalues_symentric() {

	EigenvalueDecomposition decomposition =
			new EigenvalueDecomposition(matrix2);
	double[] d = decomposition.getImagEigenvalues();
	assertEquals(2, d.length);
	assertEquals(0.0, d[0], 1e-10);
	assertEquals(0.0, d[1], 1e-10);
}