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arXiv 2504.04434math.GT
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通过宝石理论估计三剖分亏格

Estimating trisection genus via gem theory

University of Modena and Reggio Emilia(摩德纳与雷焦艾米利亚大学)

Maria Rita Casali, Paola Cristofori

AI总结:

利用宝石理论(边着色图)研究PL 4-流形的三剖分,证明正则亏格是闭4-流形三剖分亏格的上界,并给出从宝石直接构造三剖分图的方法,同时推广到带边情形。

摘要:

宝石是一种特殊类型的边着色图,对偶于着色三角剖分,可以表示任意维数的紧PL流形(包括闭流形和带边流形)。本文利用宝石理论研究PL 4-流形的三剖分,证明:- 图定义的不变量正则亏格是每个闭4-流形三剖分亏格的上界;- 可以从闭4-流形的任意宝石直接得到三剖分图。此外,对于具有连通边界的紧4-流形,给出了上述结果的适当推广。

英文摘要:

Gems are a particular type of edge-colored graphs, dual to colored triangulations, which represent compact PL-manifolds of arbitrary dimension, both in the closed and boundary case. In the present paper, gem theory is used to approach trisections of PL 4-manifolds, so as to prove that: - the graph-defined invariant regular genus is an upper bound for the trisection genus of each closed 4-manifold; - a trisection diagram can be directly obtained from any gem of a closed 4-manifold. Moreover, suitable extensions of the above results are presented for compact 4-manifolds with connected boundary.

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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