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7. Ricci Flow


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      Problem 7.1.

      Let M^n be a compact manifold with positive isotropic curvature. Does any blow-up limit of the Ricci flow have non-negative curvature operator?


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          Problem 7.2.

          Suppose G acts freely and isometrically on M. What kind of flows on M/G are induced by the Ricci flow on M?


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              Problem 7.3.

              Can one improve the Hsiang-Kleiner theorem on positively curved 4-manifolds with symmetry from homeomorphism to diffeomorphism by using the Ricci flow?

                  Cite this as: AimPL: Manifolds with non-negative sectional curvature, available at http://aimpl.org/nnsectcurvature.