Mathematics – Differential Geometry
Scientific paper
2004-05-14
JDG 59, 2001
Mathematics
Differential Geometry
Scientific paper
We analyze the obstruction to metrics of positive scalar curvature within a given bounded distortion class of metrics. This obstruction lives in a non-Hausdorff cohomology group Poincare dual to the uniformly finite homology studied by Block and Weinberger. One of the applications is a converse to their theorem on infinite connected sums, giving a complete picture of when such manifolds have metrics of positive scalar curvature.
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