semilocally simply connected group

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Covering group — This article is about topological covering group. For algebraic covering group, see universal perfect central extension. In mathematics, a covering group of a topological group H is a covering space G of H such that G is a topological group and… … Wikipedia
Glossary of topology — This is a glossary of some terms used in the branch of mathematics known as topology. Although there is no absolute distinction between different areas of topology, the focus here is on general topology. The following definitions are also… … Wikipedia
Hawaiian earring — In mathematics, the Hawaiian earring H is the topological space defined by the union of circles in the Euclidean plane R^2 with center (1/n,0) and radius 1/n for n=1,2,3,.... H is homeomorphic to the one point compactification of a countably… … Wikipedia

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