Braid #7

Braid group element: $\sigma_{1}^{7}\in B_{2}$
Plot:

Determinant: $$\frac{t^{6} - t^{5} + t^{4} - t^{3} + t^{2} - t + 1}{t^{3}}$$ Signatures:

$-6$ $-4$ $-2$ $0$

Gael Collinet and Pierre Guillot, 2010.