References
- D. Burago and S. Ivanov, Riemannian tori without conjugate points are flat, Geom. Funct. Anal. 4 (1994), no. 3, 259–269.
- H. Busemann, The Geometry of Geodesics, Acad. Press, New York, 1955.
- K. Grove and K. Shiohama, A generalized sphere theorem, Annals of Math. 106, (1977), 201–211.
- E. Hopf, Closed surfaces without conjugate points, Proc. Nat. Acad. of Sci. 34 (1948), 47–51.
Language: English
Page range: 265 - 270
Submitted on: Oct 9, 2022
Accepted on: Feb 6, 2023
Published on: May 27, 2024
Published by: Ovidius University of Constanta
In partnership with: Paradigm Publishing Services
Publication frequency: 3 issues per year
Related subjects:
© 2024 Luca Sabatini, published by Ovidius University of Constanta
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.