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Euler characteristics and 4-manifolds

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Ian Hambleton
McMaster University
Don, 23/03/2023 - 12:00 - 13:00
MPIM Lecture Hall

Contact: Aru Ray (aruray @

We consider the Euler characteristics of closed orientable 2n-manifolds with a given fundamental group G, and highly-connected universal cover. We  strengthen the 4-dimensional Hausmann-Weinberger estimates and extend to higher dimensions.  As an application we obtain new restrictions for non-abelian finite groups arising as fundamental groups of rational homology 4-spheres.

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