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arXiv 1208.2297math.DGmath.SG
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Poisson子流形的刚性

Rigidity around Poisson Submanifolds

Ioan Marcut

摘要:

利用Nash-Moser快速收敛方法证明了紧Poisson子流形周围Poisson几何中的一个刚性定理。在单点子流形的情况下(不动点),这立即意味着一个更强版本的康恩的线性化定理,也证明康恩的定理,确实,只是一个刚性现象的表现形式;类似地,在任意辛叶的情况下,它给出了一个更强版本的局部范式定理;另一个有趣的情形对应于紧半单李代数的球面内的Poisson模空间,我们的结果可以用来完全计算由此得到的Poisson模空间。

英文摘要:

We prove a rigidity theorem in Poisson geometry around compact Poisson submanifolds, using the Nash-Moser fast convergence method. In the case of one-point submanifolds (fixed points), this immediately implies a stronger version of Conn's linearization theorem, also proving that Conn's theorem is, indeed, just a manifestation of a rigidity phenomenon; similarly, in the case of arbitrary symplectic leaves, it gives a stronger version of the local normal form theorem; another interesting case corresponds to spheres inside duals of compact semisimple Lie algebras, our result can be used to fully compute the resulting Poisson moduli space.

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