The tropical Ehrhart coefficient bound by tropical minors

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Let TN\mathbb{T}\mathbb{N} denote the tropical natural numbers, let M∈TNd×mM \in \mathbb{T}\mathbb{N}^{d \times m}, and let P=tconv⁡(M)P=\operatorname{tconv}(M) be the corresponding tropical lattice polytope. For i∈[d]={1,…,d}i\in[d]=\{1,\ldots,d\}, let cib(P)c^b_i(P) be the iith tropical Ehrhart coefficient and let tm⁡i(M)\operatorname{tm}_i(M) be the iith tropical minor. The tropical minor conjecture. For every i∈[d]i\in[d],

Log⁡ card⁡{cib(P)}≤tm⁡i(M).\operatorname{Log}\,\operatorname{card}\{c^b_i(P)\}\leq \operatorname{tm}_i(M).

This conjecture proposes that the maximal tropical ii-minors provide upper bounds for the corresponding tropical Ehrhart coefficients, extending the analogous bound established earlier in the paper. The case i=1i=1 is proved by the preceding proposition, while the general bound is left as a conjecture.

References

Primary source

Georg Loho and Matthias Schymura, “Tropical Ehrhart Theory and Tropical Volume”, arXiv:1908.07893 (2019).

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