eigenvalue = -6	mult 1
eigenvalue = -3.4641	mult 2
eigenvalue = -3.23607	mult 4
eigenvalue = -2.82843	mult 4
eigenvalue = -2	mult 1
eigenvalue = -1.23607	mult 4
eigenvalue = 0	mult 16
eigenvalue = 1.23607	mult 4
eigenvalue = 2	mult 1
eigenvalue = 2.82843	mult 4
eigenvalue = 3.23607	mult 4
eigenvalue = 3.4641	mult 2
eigenvalue = 6	mult 1