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arXiv 1111.1552math.AGhep-thmath.SG
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13/2计数曲线的方法

13/2 ways of counting curves

R. Pandharipande, R. P. Thomas

摘要:

在过去的20年里,代数簇X中曲线族的紧化已经通过稳定映射、Hilbert格式、稳定对、非分歧映射和稳定映射等方法得到了研究。每条路径都指向不同的曲线枚举。一个共同的线索是使用2项变形/障碍理论来定义虚拟基本类。当X是一个3维的非奇异射影簇时,会出现最丰富的几何。我们在这里调查13/2的主要方法来计算曲线,特别注意3倍的情况。不同的理论是由我们强调的自然关系网联系在一起的。我们的目标是为研究生提供一个指导,寻找一个基本的路线进入主题。

英文摘要:

In the past 20 years, compactifications of the families of curves in algebraic varieties X have been studied via stable maps, Hilbert schemes, stable pairs, unramified maps, and stable quotients. Each path leads to a different enumeration of curves. A common thread is the use of a 2-term deformation/obstruction theory to define a virtual fundamental class. The richest geometry occurs when X is a nonsingular projective variety of dimension 3. We survey here the 13/2 principal ways to count curves with special attention to the 3-fold case. The different theories are linked by a web of conjectural relationships which we highlight. Our goal is to provide a guide for graduate students looking for an elementary route into the subject.

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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