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yesterday vote accept Caramello
Nov 14, 2022 at 11:05 answer added Anton Petrunin timeline score: 6
Sep 11, 2016 at 12:01 comment added Igor Belegradek Curvature bounds tend to get destroyed by averaging. For example, most of the current research in positive sectional curvature is on classifying manifolds with large isometry groups, and there are many Lie group actions which cannot preserve positively/nonnegatively curved metrics. See e.g. the surveys at math.upenn.edu/~wziller/research.html.
Sep 11, 2016 at 9:08 history edited Caramello CC BY-SA 3.0
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Sep 11, 2016 at 9:03 history asked Caramello CC BY-SA 3.0