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arXiv 0705.1792math.AGmath.DG
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Riemann surfaces,带状图和组合类

Riemann surfaces, ribbon graphs and combinatorial classes

Gabriele Mondello

摘要:

这篇综述论文首先描述了嵌入在穿孔表面上的弧系统和带状图之间的对偶性。然后,我们解释如何细胞化的模空间的曲线在两种不同的方式:使用Jenkins-Strebel微分和使用双曲几何。我们还简要讨论了这两种方法是如何相关的。接下来,我们回顾了威滕循环的定义,并说明了它们与重言式类和Weil-Petersson几何的关系。最后,我们展示了一个简单的直接论证,证明Witten类是稳定的。

英文摘要:

This survey paper begins with the description of the duality between arc systems and ribbon graphs embedded in a punctured surface. Then we explain how to cellularize the moduli space of curves in two different ways: using Jenkins-Strebel differentials and using hyperbolic geometry. We also briefly discuss how these two methods are related. Next, we recall the definition of Witten cycles and we illustrate their connection with tautological classes and Weil-Petersson geometry. Finally, we exhibit a simple direct argument to prove that Witten classes are stable.

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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