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On Moduli Spaces of Positive Scalar Curvature Metrics on Highly Connected Manifolds
International Mathematics Research Notices ( IF 1.452 ) Pub Date : 2020-01-11 , DOI: 10.1093/imrn/rnz386
Wiemeler M.

Let $M$ be a simply connected spin manifold of dimension at least six, which admits a metric of positive scalar curvature. We show that the observer moduli space of positive scalar curvature metrics on $M$ has non-trivial higher homotopy groups. Moreover, denote by $\mathcal{M}_0^+(M)$ the moduli space of positive scalar curvature metrics on $M$ associated to the group of orientation-preserving diffeomorphisms of $M$. We show that if $M$ belongs to a certain class of manifolds that includes $(2n-2)$-connected $(4n-2)$-dimensional manifolds, then the fundamental group of $\mathcal{M}_0^+(M)$ is non-trivial.
更新日期:2020-01-13

 

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