arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1102.4861math.GTmath.CO
收藏

通过双裤分解的模量

Moduli via double pants decompositions

Anna Felikson, Sergey Natanzon

摘要:

我们考虑(局部)参数化的Teichmuller空间$T_{g,n}$(属$g$双曲曲面与$n$边界组件)的$6g-6+3n$测地线的长度。我们发现了一个大家庭的合适的集合的$6g-6+3n$测地线,每个集形成一个特殊的结构,称为“容许双裤分解”。对于允许的双裤分解不包含双曲线,我们表明,在分解中包含的曲线的长度确定点的$T_{g,n}$多达1000的选择。此外,这些长度提供了$T_{g,n}\setminus X$的所有点的邻域中的局部坐标,其中$X$是$3g-3+n$超曲面的并集。此外,存在传递作用于容许双裤分解的广群,并且该广群由仅交换分解的一条曲线的变换生成。由不同的双裤分解产生的局部图组成覆盖Teichmuller空间的地图集。相邻图的胶合来自分解的初等变换,胶合函数是代数的。同样的图表提供了一个图集的大部分边界层的德利涅-芒福德紧化的模空间。

英文摘要:

We consider (local) parametrizations of Teichmuller space $T_{g,n}$ (of genus $g$ hyperbolic surfaces with $n$ boundary components) by lengths of $6g-6+3n$ geodesics. We find a large family of suitable sets of $6g-6+3n$ geodesics, each set forming a special structure called "admissible double pants decomposition". For admissible double pants decompositions containing no double curves we show that the lengths of curves contained in the decomposition determine the point of $T_{g,n}$ up to finitely many choices. Moreover, these lengths provide a local coordinate in a neighborhood of all points of $T_{g,n}\setminus X$, where $X$ is a union of $3g-3+n$ hypersurfaces. Furthermore, there exists a groupoid acting transitively on admissible double pants decompositions and generated by transformations exchanging only one curve of the decomposition. The local charts arising from different double pants decompositions compose an atlas covering the Teichmuller space. The gluings of the adjacent charts are coming from the elementary transformations of the decompositions, the gluing functions are algebraic. The same charts provide an atlas for a large part of the boundary strata in Deligne-Mumford compactification of the moduli space.

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。

↑