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arXiv 0905.1434math.SGmath.ATmath.DG
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关于Hamilton回路不变量的注记

Remarks on invariants of hamiltonian loops

Egor Shelukhin

摘要:

本文研究了Hamilton自同态群的$π_1$上的几个自然态射之间的相互关系。作为应用,证明了$\C P^n$的预量子化的量子态环的(非线性)Maslov指标与Calabi-Weinstein不变量的相等性,从而肯定地解决了A.吉文塔尔我们还证明了Fano Kahler流形的Hamilton双全纯映射的环上的混合作用Maslov态射和Futaki不变量的比例性。伍德沃德最后,通过复曲面流形的矩多面体的重心计算了复曲面流形的一类广义作用-Maslov不变量,并将其应用于最近由D. McDuff和S.托尔曼

英文摘要:

In this note the interrelations between several natural morphisms on the $π_1$ of groups of Hamiltonian diffeomorphisms are investigated. As an application, the equality of the (non-linear) Maslov index of loops of quantomorphisms of prequantizations of $\C P^n$ and the Calabi-Weinstein invariant is shown, settling affirmatively a conjecture by A. Givental. We also prove the proportionality of the mixed action-Maslov morphism and the Futaki invariant on loops of Hamiltonian biholomorphisms of Fano Kahler manifolds, as suggested by C. Woodward. Finally, a family of generalized action-Maslov invariants is computed for toric manifolds via barycenters of their moment polytopes, with an application to mass-linear functions recently introduced by D. McDuff and S. Tolman.

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