A long-time Ricci flow with Ric ≥ -ψ/t and sufficiently large injectivity radius forces the manifold to be diffeomorphic to R^n, improving dimension-4 small-curvature-concentration results.
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A note on a diffeomorphism criterion via long-time Ricci flow
A long-time Ricci flow with Ric ≥ -ψ/t and sufficiently large injectivity radius forces the manifold to be diffeomorphic to R^n, improving dimension-4 small-curvature-concentration results.