Almost positive Ricci curvature in Kato sense -- an extension of Myers' theorem
arXiv:1907.07440
Abstract
It is shown that if the Kato constant of the negative part of the Ricci curvature below a positive level is small, then the volume of the corresponding manifold can be bounded above in terms of the Kato constant and the total Ricci curvature. Together with the results from [5] and [6], this yields a generalization of the famous Bonnet-Myers theorem. Connections to some earlier generalizations are discussed.
Comments are welcome! 7 pages. To appear in Mathematical Research Letters