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Lifting tropical self intersections

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arxiv 1806.01334 v2 pith:D3VTH5US submitted 2018-06-04 math.AG math.CO

classification math.AGmath.CO
keywords tropicaldivisorsdimensionintersectionsrealizabletropicalizationariseassumption
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We study the tropicalization of intersections of plane curves, under the assumption that they have the same tropicalization. We show that the set of tropical divisors that arise in this manner is a pure dimensional balanced polyhedral complex and compute its dimension. When the genus is at most 1, we show that all the tropical divisors that move in the expected dimension are realizable. As part of the proof, we introduce a combinatorial tool for explicitly constructing large families of realizable tropical divisors.

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  1. Tropical geometry

    math.AG 2019-08 unverdicted novelty 1.0 of 10

    A pedagogical survey of tropical geometry covering tropical arithmetic, tropical varieties, duality, Bézout's theorem, and tropicalization, with no new research results.

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