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Exotic aspherical -manifolds
Michael Davis, Kyle Hayden, Jingyin Huang, Daniel Ruberman, Nathan Sunukjian
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Source: Crossref
Published: Sep 1, 2026
DOI: 10.4007/annals.2026.204.2.6
Open original source ↗Source abstract
We prove that there exist closed, aspherical, smooth -manifolds that are homeomorphic but not diffeomorphic. These provide counterexamples to a smooth analog of the Borel conjecture in dimension four.
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