graf 16, signabilita +0 -1, determinant = 2.000000, spectrum = -1.6180, -1.4728, -0.4626, 0.6180, 2.9354, ; B = [[0 0 1 1 1 ];[0 0 0 1 1 ];[1 0 0 0 1 ];[1 1 0 0 1 ];[1 1 1 1 0 ];];    Dpos = [[0 0 0 0 0 ];[0 0 0 0 0 ];[0 0 0 0 0 ];[0 0 0 0 0 ];[0 0 0 0 0 ];];    Dneg = [[1 0 0 0 0 ];[0 -1 0 0 0 ];[0 0 -1 0 0 ];[0 0 0 1 0 ];[0 0 0 0 -1 ];];