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Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.
splitting off this definition from neighborhood retract, for ease of linking, and in order to record the characterization AR = ANR+contractible
added pointer to the original
and to
I have added statement of the key examples (topological manifolds and locally finite CW complexes, both finite-dimensional) with references
This now incorporates some but not yet all of Dmitri’s pointers here. Generally, there is much room to expand on this Examples-section. It looks like this page could be doing the world a favor by being the first source to state all this up-front.
added pointer to
and from this the proposition (now here) that all paracompact Banach manifolds are ANRs.
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