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• #### Boundary Conditions for Scalar Curvature ﻿

[OWP-2021-01] (Mathematisches Forschungsinstitut Oberwolfach, 2021-01-04)
Based on the Atiyah-Patodi-Singer index formula, we construct an obstruction to positive scalar curvature metrics with mean convex boundaries on spin manifolds of infinite $K$-area. We also characterize the extremal case. ...