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arXiv 1106.4449math.SG
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几乎拉格朗日阻塞

Almost Lagrangian Obstruction

Daniele Sepe

摘要:

本文的目的是描述一个几乎拉格朗日纤维化是拉格朗日的障碍,这是一个中心的问题,拉格朗日纤维化的分类,更一般地说,理解的障碍进行手术的可积系统,一个想法介绍了Zung。证明了这种障碍(即Dazord和Delzant的同态)与纤维化的底空间B上的局部系数的上同调的上积有关。明确地描述了地图和计算的一些例子,从而提供了第一个例子的非平凡拉格朗日障碍。

英文摘要:

The aim of this paper is to describe the obstruction for an almost Lagrangian fibration to be Lagrangian, a problem which is central to the classification of Lagrangian fibrations and, more generally, to understanding the obstructions to carry out surgery of integrable systems, an idea introduced by Zung. It is shown that this obstruction (namely, the homomorphism of Dazord and Delzant) is related to the cup product in cohomology with local coefficients on the base space B of the fibration. The map is described explicitly and some examples are calculated, thus providing the first examples of non-trivial Lagrangian obstructions.

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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