eigenvalue = -7	mult 1
eigenvalue = -3.69232	mult 6
eigenvalue = -3	mult 9
eigenvalue = -1	mult 10
eigenvalue = -0.605599	mult 6
eigenvalue = 0.605599	mult 6
eigenvalue = 1	mult 10
eigenvalue = 3	mult 9
eigenvalue = 3.69232	mult 6
eigenvalue = 7	mult 1