eigenvalue = -6	mult 1
eigenvalue = -2.82843	mult 2
eigenvalue = -2.73205	mult 2
eigenvalue = -2.44949	mult 4
eigenvalue = -2	mult 2
eigenvalue = -1.41421	mult 4
eigenvalue = -0.732051	mult 2
eigenvalue = 0	mult 2
eigenvalue = 0.732051	mult 2
eigenvalue = 1.41421	mult 4
eigenvalue = 2	mult 2
eigenvalue = 2.44949	mult 4
eigenvalue = 2.73205	mult 2
eigenvalue = 2.82843	mult 2
eigenvalue = 6	mult 1