1.0 1.0 1 1 1 -1.0 -1.0 1 1.0 1.0 1 1 1 -1.0 0 1 1.0 1.0 1 1 1 0 -1.0 1 1.0 1.0 1 1 1 0 0 1 eigenvalue 1000 10 5