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11 votes
5 answers
2k views

Ricci Curvature in infinite dimensions?

Is there a good notion of "Ricci curvature" in infinite dimensions? My intuitive understanding of Ricci curvature is that it is some kind of an "average" of the curvature tensor over "different ...
BrainDead's user avatar
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9 votes
3 answers
752 views

Non-Kahler manifolds where the different Laplacians are compatible

On a Kahler manifold, the different Laplacians are compatible: $\Delta_d=2\Delta_{\bar{\partial}}=2\Delta_{\partial}$. Are there non-Kahler Hermitian manifolds where the above identity holds?
user avatar
5 votes
1 answer
1k views

Orthogonal complements in Hilbert bundles

It's a standard fact that for a finite-dimensional vector bundle with an inner product, the othogonal complement of any subbundle is itself a locally trivial vector bundle. What is known about the ...
Dan Ramras's user avatar
  • 8,803

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