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arXiv 0811.0089math.LOmath.GR
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关于o-极小结构中的中心扩张与可定义紧群

On central extensions and definably compact groups in o-minimal structures

Ehud Hrushovski, Ya'acov Peterzil, Anand Pillay

摘要:

本文证明了实封闭的域的o-极小扩张中可定义紧群G的几个结构性结果,如(i)G可定义为半单群与交换群的几乎直积,(ii)群(G,.)基本上等价于(G/G^00,.)。我们还证明了结果的内部有限覆盖的G在O-极小环境,以及充分的紧控制猜想。这些结果取决于关键定理的可解释性的中心和有限扩张的可定义的群体,在O-最小的上下文中。这些方法和其他方法也给出了任意可定义的实李群的泛覆盖的可解释性结果,从中我们可以推导出诸如SL(2,R)的李群的有限覆盖的半代数性。

英文摘要:

We prove several structural results on definably compact groups G in o-minimal expansions of real closed fields, such as (i) G is definably an almost direct product of a semisimple group and a commutative group, and (ii) the group (G, .) is elementarily equivalent to (G/G^00, .). We also prove results on the internality of finite covers of G in an o-minimal environment, as well as the full compact domination conjecture. These results depend on key theorems about the interpretability of central and finite extensions of definable groups, in the o-minimal context. These methods and others also yield interpretability results for universal covers of arbitrary definable real Lie groups, from which we can deduce the semialgebraicity of finite covers of Lie groups such as SL(2,R).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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