eigenvalue = -6	mult 2
eigenvalue = -4.73205	mult 5
eigenvalue = -4	mult 2
eigenvalue = -2.73205	mult 15
eigenvalue = -1.26795	mult 5
eigenvalue = -0.732051	mult 15
eigenvalue = 0.732051	mult 15
eigenvalue = 1.26795	mult 5
eigenvalue = 2	mult 1
eigenvalue = 2.73205	mult 15
eigenvalue = 4	mult 1
eigenvalue = 4.73205	mult 5
eigenvalue = 6	mult 1
eigenvalue = 8	mult 1