The higher-dimensional Ricci compactness conjecture

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Let MM be complete, let OO be a fixed origin, and suppose that for some r0>0r_0>0 the Ricci curvature is bounded below by (n−1)/(4r2)(n-1)/(4r^2) whenever r≥r0r\geq r_0. Higher-dimensional Ricci compactness conjecture. If there are kk linearly independent geodesics through OO along which

Ric⁡≥n−1r2(14+ν2),\operatorname{Ric}\geq\frac{n-1}{r^2}\left(\frac14+\nu^2\right),

then MM is compact. The source presents this as a proposed compactness criterion and gives no resolution.

References

Primary source

D. Holcman and C. Pugh, “The Boundary between Compact and Noncompact Complete Riemann Manifolds”, arXiv:math/0501414 (2005).

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