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arXiv 0901.0208math.GT
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三维流形中曲面的拓扑指数理论

Topological Index Theory for Surfaces in 3-Manifolds

David Bachman

摘要:

利用三维流形中曲面的圆盘复形定义曲面的{ \it拓扑指数}。具有良好定义的拓扑指数的曲面被证明是不可压缩曲面、强不可约曲面和临界曲面的推广。主要结果是,人们总是可以同位素的表面$H$拓扑指数$n$,以满足不可压缩的表面$F$,使$H \setminus N(F)$的组件的指数之和最多是$n$。这个定理及其推论推广了许多已知的关于三维流形中曲面的结果,并且常常提供更有效的证明。本文最后列出了一系列的问题和解答,包括一个自然的推广亨佩尔的{ \it距离}的表面拓扑指数$\ge 2$。

英文摘要:

The disk complex of a surface in a 3-manifold is used to define its {\it topological index}. Surfaces with well-defined topological index are shown to generalize well-known classes, such as incompressible, strongly irreducible, and critical surfaces. The main result is that one may always isotope a surface $H$ with topological index $n$ to meet an incompressible surface $F$ so that the sum of the indices of the components of $H \setminus N(F)$ is at most $n$. This theorem and its corollaries generalize many known results about surfaces in 3-manifolds, and often provides more efficient proofs. The paper concludes with a list of questions and conjectures, including a natural generalization of Hempel's {\it distance} to surfaces with topological index $\ge 2$.

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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