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arXiv 2503.00541math.DGmath.DS
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莫尔斯-博特体积形式

Morse-Bott Volume Forms

Luke Volk, Boris Khesin

AI总结:

本文研究莫尔斯-博特体积形式的微分同胚等价性,证明相对上同调类一致时两形式微分同胚,余维数≥2的零子流形情形下等价于总体积相等,并适配莫泽技巧到该场景。

摘要:

流形上的莫尔斯-博特体积形式是沿非退化临界子流形消失的最高次形式。我们证明,若两个这样的形式关于该子流形的相对上同调类一致,则它们是微分同胚的(通过在子流形上固定的微分同胚)。对于余维数至少为2的零子流形,这意味着具有相同零集的两个莫尔斯-博特体积形式微分同胚当且仅当它们的总体积相等。我们展示了用于建立非退化体积形式等价性的“莫泽技巧”如何适应这种情况。

英文摘要:

A Morse-Bott volume form on a manifold is a top-degree form which vanishes along a non-degenerate critical submanifold. We prove that two such forms are diffeomorphic (by a diffeomorphism fixed on the submanifold) provided that their relative cohomology classes with respect to the submanifold coincide. For a zero submanifold of codimension at least 2, this means that two Morse-Bott volume forms with the same zero set are diffeomorphic if and only if they have equal total volumes. We show how "Moser's trick" for establishing equivalence of non-degenerate volume forms can be adapted to this setting.

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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