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Results tagged with at.algebraic-topology
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user 333194
Homotopy theory, homological algebra, algebraic treatments of manifolds.
4
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Contractible 4-manifold with an exhaustion
It seems to me that there is an obvious Whitehead-manifold inspired construction to try here to produce a counterexample. Let $w : S^1 \times D^2 \to S^1 \times \operatorname{int} D^2$ be the familiar …
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