Spaces of Positive Scalar Curvature metrics on totally nonspin Manifolds with spin boundary

Abstract

In this article we study the space of positive scalar curvature metrics on totally nonspin manifolds with spin boundary. We prove that for such manifolds of certain dimensions, those spaces are not connected and have nontrivial fundamental group. Furthermore we show that a well-known propagation technique for detection results on spaces of positive scalar curvature metrics on spin manifolds ceases to work in the totally nonspin case.

arXiv comment14 pages, 2 figures. Accepted for publication in Mathematische Zeitschrift. Video abstract available here: https://www.youtube.com/watch?v=ew3is8UTw6k

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