摘要翻译:
具有固定分支轨迹的射影线的Hurwitz数计数亏格g,d度覆盖。这等于定义在Hurwitz空间上的自然分支映射的度。在热带几何学中,代数曲线被某些称为热带曲线的分段线性物体所取代。本文发展了分支图的一个热带对应图,并证明了它的度恢复了经典Hurwitz数。
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英文标题:
《Tropical Hurwitz Numbers》
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作者:
Renzo Cavalieri, Paul Johnson and Hannah Markwig
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最新提交年份:
2010
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分类信息:
一级分类:Mathematics 数学
二级分类:Algebraic Geometry 代数几何
分类描述:Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology
代数簇,叠,束,格式,模空间,复几何,量子上同调
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一级分类:Mathematics 数学
二级分类:Combinatorics 组合学
分类描述:Discrete mathematics, graph theory, enumeration, combinatorial optimization, Ramsey theory, combinatorial game theory
离散数学,图论,计数,组合优化,拉姆齐理论,组合对策论
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英文摘要:
Hurwitz numbers count genus g, degree d covers of the projective line with fixed branch locus. This equals the degree of a natural branch map defined on the Hurwitz space. In tropical geometry, algebraic curves are replaced by certain piece-wise linear objects called tropical curves. This paper develops a tropical counterpart of the branch map and shows that its degree recovers classical Hurwitz numbers.
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PDF链接:
https://arxiv.org/pdf/0804.0579