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Tropical Poincar\'e bundle, Fourier-Mukai transform, and a generalized Poincar\'e formula

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arxiv 2503.12835 v1 pith:Y2B2AONT submitted 2025-03-17 math.AG math.CO

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keywords poincartropicalformulaabeliananaloguebundlefourier-mukaigeneralized
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We construct a tropical analogue of the Poincar\'e bundle and prove a (cohomological) Fourier-Mukai transform for real tori with integral structures. We then prove a tropical analogue of Beauville's generalized Poincar\'e formula for polarized abelian varieties. Some consequences include a geometric Riemann-Roch theorem for tropical abelian varieties, as well as a tropical Poincar\'e-Prym formula which was recently conjectured by R\"ohrle and Zakharov.

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  1. Topology and Euler characteristics of tropical varieties

    math.AG 2026-06 unverdicted novelty 7.0 of 10

    Every H-regular d-dimensional tropical subvariety of a tropical abelian variety has (−1)^d χ(X) ≥ 0, with counterexamples when H-regularity is dropped.

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