Suppose we have a group $G$ acting on a topological space $X$, and there exists a $contractible$ open set $U$ in $X$ such that the orbit of $U$ is $X$.
2026-03-28 08:09:32.1774685372
What is this property of a group action called?
35 Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail AtRelated Questions in GROUP-ACTIONS
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