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Complex, contact, Riemannian, pseudo-Riemannian and Finsler geometry, relativity, gauge theory, global analysis.

4 votes
1 answer
201 views

estimate over simply-connected Riemannian manifold with non-positive sectional curvature

Let $M$ be a Complete simply-connected $n$-dimensional Riemannian manifold with non-positive curvature,$\Omega $ is a open subset of $M$ ,If $n\geq 4$ Is anyone give a estimate of $\frac{Vol_{n}\l …
喻yuwei's user avatar
  • 119
2 votes

de Rham vs Dolbeault Cohomology

1.De Rham cohomology is a cohomology of k-forms on complex manifold。 Dolbeault Cohomology is a cohomology of smooth sections of the vector bundle of complex differential forms of degree (p,q) on compl …
喻yuwei's user avatar
  • 119
1 vote
0 answers
183 views

Isoperimetric inequality from Cartan-Hadamard manifold extend to Alexandrov space

We known that Croke proved a isoperimetric inequality for the four dimensional Cartan-Hadamard manifold,I want to ask extend to Alexandrov space that whether have same isoperimetric inequality ?Whethe …
喻yuwei's user avatar
  • 119