# The arithmetic Tutte polynomials of the classical root systems

Abstract : Many combinatorial and topological invariants of a hyperplane arrangement can be computed in terms of its Tutte polynomial. Similarly, many invariants of a hypertoric arrangement can be computed in terms of its arithmetic Tutte polynomial. We compute the arithmetic Tutte polynomials of the classical root systems $A_n, B_n, C_n$, and $D_n$ with respect to their integer, root, and weight lattices. We do it in two ways: by introducing a \emphfinite field method for arithmetic Tutte polynomials, and by enumerating signed graphs with respect to six parameters.
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https://hal.inria.fr/hal-01207564
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Federico Ardila, Federico Castillo, Michael Henley. The arithmetic Tutte polynomials of the classical root systems. 26th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2014), 2014, Chicago, United States. pp.851-862, ⟨10.46298/dmtcs.2447⟩. ⟨hal-01207564⟩

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