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arXiv math-ph/0001008math-phhep-thmath.MP
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广义规范轨道空间的层化

Stratification of the Generalized Gauge Orbit Space

Christian Fleischhack

摘要:

研究了紧致结构群$\LG$中Ashtekar广义规范群$\Gb$在广义联络空间$\Ab$上的作用.首先定义一个层是同一个规范轨道类型的所有联络的集合,即完整群的中心化子的共轭类。然后在$\Ab$上证明了一个切片定理。这就产生了地层的开放性。然后,证明了地层的稠密性定理。因此,$\Ab$在拓扑上规则地由$\Gb$分层。这些结果与Kondracki和Rogulski关于Sobolev联络的结果一致。作为副产品,我们证明了所有规范轨道类型的集合等于$\LG$的所有Howe子群(共轭类)的集合。最后,我们证明了所有最大型规范轨道的集合具有全诱导Haar测度1。

英文摘要:

The action of Ashtekar's generalized gauge group $\Gb$ on the space $\Ab$ of generalized connections is investigated for compact structure groups $\LG$. First a stratum is defined to be the set of all connections of one and the same gauge orbit type, i.e. the conjugacy class of the centralizer of the holonomy group. Then a slice theorem is proven on $\Ab$. This yields the openness of the strata. Afterwards, a denseness theorem is proven for the strata. Hence, $\Ab$ is topologically regularly stratified by $\Gb$. These results coincide with those of Kondracki and Rogulski for Sobolev connections. As a by-product, we prove that the set of all gauge orbit types equals the set of all (conjugacy classes of) Howe subgroups of $\LG$. Finally, we show that the set of all gauge orbits with maximal type has the full induced Haar measure 1.

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