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What specifically is the gap in Aubin's argument about positive Ricci curvature that Paul Eh...

In his paper [2], Paul Ehrlich write In [1], Aubin stated a theorem which implied as a corollary that if a manifold $M$ admits a Riemannian metric with nonnegative Ricci curvature and all Ricci curva …
C.F.G's user avatar
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2 votes
1 answer
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Is there any Riemannian manifold of zero dimensional isometry group such that

Sorry if this question is belongs to MSE. I have no idea about it. Question: Is there any Riemannian manifold of zero dimensional isometry group which its Ricci curvature is positive (or maybe zer …
C.F.G's user avatar
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9 votes

Deforming metrics from non-negative to positive Ricci curvature

This is not a complete answer but would be helpful. Here are a few facts: Theorem (T. Aubin 1970 and P. Ehrlich 1976). If the Ricci curvature of a compact Riemannian manifold is non-negative and posit …
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