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arXiv 1006.4869math.AG
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热带曲线上的自同构群:上同调计算

Automorphism Groups on Tropical Curves: Some Cohomology Calculations

David Joyner, Amy Ksir, Caroline Grant Melles

摘要:

设$X$是抽象热带曲线,$G$是$X$的自同构群的有限子群.设$D$是等价类为$G$ -不变的$X$上的除数.我们解决以下问题:是否总是有一个除数$D'$在等价类的$D$是$G$不变的?我们的主要结果是,答案是“是”的所有抽象的热带曲线。在我们的证明中的一个关键步骤是希尔伯特定理90的热带模拟。

英文摘要:

Let $X$ be an abstract tropical curve and let $G$ be a finite subgroup of the automorphism group of $X$. Let $D$ be a divisor on $X$ whose equivalence class is $G$-invariant. We address the following question: is there always a divisor $D'$ in the equivalence class of $D$ which is $G$-invariant? Our main result is that the answer is "yes" for all abstract tropical curves. A key step in our proof is a tropical analogue of Hilbert's Theorem 90.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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