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arXiv math/9908001math.DG
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关于具有非球面辛形式的辛流形

On symplectic manifolds with aspherical symplectic form

Yuli Rudyak, Aleksy Tralle

摘要:

我们考虑闭辛非球面流形,即满足条件$[ω]|_{π_2M}=0$的闭辛流形$(M,ω)$。Rudyak和Oprea [RO]指出,这种流形具有良好的和可控的同伦性质。现在很清楚,这些性质主要是由$[ω]$的严格类别权重等于2这一事实决定的。本文将严格范畴权理论应用于辛磁场中带电粒子闭轨道数目的估计问题。在辛非球面流形的情况下,我们的理论使我们能够改进一些已知的估计。

英文摘要:

We consider closed symplectically aspherical manifolds, i.e. closed symplectic manifolds $(M,ω)$ satisfying the condition $[ω]|_{π_2M}=0$. Rudyak and Oprea [RO] remarked that such manifolds have nice and controllable homotopy properties. Now it is clear that these properties are mostly determined by the fact that the strict category weight of $[ω]$ equals 2. We apply the theory of strict category weight to the problem of estimating the number of closed orbits of charged particles in symplectic magnetic fields. In case of symplectically aspherical manifolds our theory enables us to improve some known estimations.

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