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Exotic aspherical$4$ -manifolds
Journal article

Exotic aspherical$4$ -manifolds

Michael Davis, Kyle Hayden, Jingyin Huang, Daniel Ruberman and Nathan Sunukjian
Annals of mathematics, Vol.204(2), pp.777-794
09/01/2026
Handle:
https://hdl.handle.net/10192/80192

Abstract

We prove that there exist closed, aspherical, smooth$4$ -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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