Games orbits play and obstructions to Borel reducibility

Games orbits play and obstructions to Borel reducibility
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游戏轨道游戏和 Borel 可还原性障碍

DOI:
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发表时间:
2016
期刊:
Groups, Geometry, and Dynamics
影响因子:
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通讯作者:
Aristotelis Panagiotopoulos
Aristotelis Panagiotopoulos
中科院分区:
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文献类型:
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作者:
M. Lupini;Aristotelis Panagiotopoulos

文献摘要

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我们引入了一种新的博弈论方法来处理轨道等价关系的反分类结果。在这个框架内,我们给出了Hjorth湍流定理的一个简短的概念性证明。我们还引入了一个新的动力学判据,为按轨道分类提供了障碍。将此准则应用于可分离无限维Hilbert空间上的可数实数集的相等关系,以及幺正算子和自伴随算子的幺正共轭关系。
We introduce a new, game-theoretic approach to anti-classification results for orbit equivalence relations. Within this framework, we give a short conceptual proof of Hjorth’s turbulence theorem. We also introduce a new dynamical criterion providing an obstruction to classification by orbits of CLI groups. We apply this criterion to the relation of equality of countable sets of reals, and the relations of unitary conjugacy of unitary and selfadjoint operators on the separable infinite-dimensional Hilbert space.