Wednesday, 24 February 2016

gn.general topology - In a locally contractible space can we find local bases of contractible sets whose closures are locally contractible?

In a locally contractible topological space $X$ is it possible at each point $x$ to find a local basis of contractible sets $U_ini x$ such that the closure of each set $overline{U_i} subset X$ is also locally contractible?



More precisely, for this question we may assume $X$ is compact and is an ANR (for the class of separable metric spaces), we can even assume that $X$ is embedded as a subspace of $mathbb{R}^n$ if that makes the question easier.

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