eigenvalue = -8	mult 1
eigenvalue = -3.4641	mult 4
eigenvalue = -2.82843	mult 12
eigenvalue = -2	mult 12
eigenvalue = 0	mult 6
eigenvalue = 2	mult 12
eigenvalue = 2.82843	mult 12
eigenvalue = 3.4641	mult 4
eigenvalue = 8	mult 1