arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2408.07044math.GT
收藏

端周期映射环面的短曲线

Short curves of end-periodic mapping tori

Brandis Whitfield

AI总结:

该文证明端周期映射环面存在双曲结构,使叶状结构间距离足够大时边界长度可任意小,并构造闭纤维化双曲3-流形嵌入全测地曲面且 systole 长度任意小。

摘要:

设$S$为具有有限个端的无边界无限型曲面,并考虑$S$的端周期同胚$f$。$f$的端周期性确保其相关的映射环面$M_f$具有作为带边界的$3$-流形的紧化;进一步,若$f$是非环面的,则$M_f$允许双曲度量。此类映射具有不变的正、负Handel--Miller叶状结构$\Lambda^+$、$\Lambda^-$,其叶子自然投影到紧致子曲面$Y\subset S$的弧与曲线复形上。作为Minsky在有限型情形下工作的端周期类比,我们证明存在$M_f$的双曲结构$s$,使得对于每个$\varepsilon>0$,存在$K>0$(仅依赖于$\varepsilon$和$f$的容量),当$d_Y(\Lambda^+, \Lambda^-)\geq K$时,有$\ell_s(\partial Y)\leq \varepsilon$。这里$\ell_s(\partial Y)$表示$(M_f, s)$中$\partial Y$的测地线代表元的总长度。这项工作还产生以下结果:对于每个$\varepsilon>0$和亏格$g\geq 2$的闭连通曲面$\Sigma$,我们提供一个闭的纤维化双曲$3$-流形,其中$\Sigma$作为全测地曲面嵌入,其 systole 长度至多为$\varepsilon$。

英文摘要:

Let $S$ be a boundaryless infinite-type surface with finitely many ends and consider an end-periodic homeomorphism $f$ of S. The end-periodicity of $f$ ensures that its associated mapping torus $M_f$ has a compactification as a $3$-manifold with boundary; further, if $f$ is atoroidal then $M_f$ admits a hyperbolic metric. Such maps admit invariant positive and negative Handel--Miller laminations, $Λ^+$, $Λ^-$, whose leaves naturally project to the arc and curve complex of a compact subsurface $Y\subset S$. As an end-periodic analogy to work of Minsky in the finite-type setting, we show that there exists a hyperbolic structure $s$ of $M_f$ such that for every $\varepsilon>0$ there exists $K> 0$ (depending only on $\varepsilon$ and the capacity of $f$) for which $d_Y (Λ^+, Λ^-)\geq K$ implies $\ell_s(\partial Y) \leq \varepsilon$. Here $\ell_s (\partial Y)$ denotes the total length of the geodesic representative of $\partial Y$ in $(M_f, s)$. This work additionally produces the following: for every $\varepsilon>0$ and closed connected surface $Σ$ of genus $g\geq 2$, we provide a closed fibered hyperbolic $3$-manifold in which $Σ$ embeds as a totally geodesic surface whose systole length is at most $\varepsilon$.

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。

↑