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首页> 外文期刊>Algebras, groups and geometries >COUNTABLY COMPACT TOPOLOGICAL SEMIGROUPS VERSUS BRANDT EXTENSIONS AND PARAGROUPS
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COUNTABLY COMPACT TOPOLOGICAL SEMIGROUPS VERSUS BRANDT EXTENSIONS AND PARAGROUPS

机译:可压缩的拓扑半群数与Brandt扩展数和群数

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摘要

In this paper we show that if S is a completely 0-simple topolog-ically periodic (regular) countably compact inverse topological semigroup and S (S× S) is inversely regular (countably compact), Then inversion inv : x→x~(-1) in S is continuous. Moreover, S is topologically isomorphic to a topological Brandt λ-extension Bλ(G) of G in the class of topological inverse semigroups. The last item generalizes an old Wallaces result saying that each simple compact topological semigroup is a topological paragroup.
机译:本文证明,如果S是一个完全为0的简单拓扑周期(规则)可数紧致的逆拓扑半群,而S(S×S)是反规则(可紧致),则反演inv:x→x〜( -1)在S中是连续的。此外,在拓扑逆半群中,S与G的拓扑布兰特λ扩展Bλ(G)在拓扑上同构。最后一项概括了一个旧的Wallaces结果,其中说每个简单的紧凑拓扑半群都是一个拓扑副群。

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