References
- Alekseevsky, A., & Alekseevsky, D. (1993). Riemannian G-manifolds with one dimensional orbit space. Annals of Global Analysis and Geometry, 11, 197–211.
- Berndt, J.(2011). Polar actions on symmetric spaces. Proceedings of The Fifteenth International Workshop on Diff. Geom (Vol. 15, pp. 1–10).
- Bredon, G. E. (1972). Introduction to compact transformation groups. New York, London: Academic Press.
- Dadok, J. (1985). Polar coordinates induced by actions of compact Lie groups. Transactions Amer Mathematical Social, 288, 125–137. doi:10.1090/S0002-9947-1985-0773051-1
- Di Scala, A. J., & Olmos, C. (2001). The geometry of homogeneous submanifolds of hyperbolic space. Mathematical Z, 237, 199–209. doi:10.1007/PL00004860
- Diaz-Ramos, J. C., & Kollross, A. (2011). Polar actions with a fixed point. Differential Geometry and Its Applications, 29, 20–25. doi:10.1016/j.difgeo.2011.01.001
- Diaz-Ramos, J. C., Sanchez, M. Romero, A. (2013). Recent trends in lorentzian geometry. Springer Proceedings in Mathematics & Statistics. doi:10.1007/978-1-4614-4897-6-14.
- Do Carmo, M. P. (1992). Riemannian geometry. Boston, MA: Birkhauser Boston, Inc.
- Eberlein, P., & O’Neil, B. (1973). Visibility manifolds. Pasific Journal Mathematical, 46, 45–109. doi:10.2140/pjm.1973.46.45
- Heidari, M., & Mirzaie, R. (2018). Polarity of cohomogeneity two actions on negatively curved space forms. To Appear in the Bulletin of the Korean Mathematical Social, (vol. 55, pp.1433-1440).
- Heintze, E., Palais, R. S., Terng, C.-L., & Thorbergsson, G. (1995). Hyperpolar actions on symmetric spaces. Geometry, Topology, and physics, Conf. proc. Lecture Note Geom. Topology, IV (pp. 214–245). Cambridge, MA: Int. Press
- Kobayashi, S. (1962). Homogeneous Riemannian manifolds of negative curvature. Tohoku Mathematical Journal, 14, 413–415. doi:10.2748/tmj/1178244077
- Kollross, A. (2007). Polar actions on symmetric spaces. Journal of Differential Geometry, 77, 425–482. doi:10.4310/jdg/1193074901
- Mirzaie, R. (2009). On negatively curved G-manifolds of low cohomogeneity. Hokkaido Mathematical Journal, 38, 797–803. doi:10.14492/hokmj/1258554244
- Mirzaie, R. (2011a). On orbits of isometric actions on flat Riemannian manifolds. Kyushu Journal Mathematical, 65, 383–393. doi:10.2206/kyushujm.65.383
- Mirzaie, R. (2011b). On Riemannian manifolds of constant negative curvature. Journal Korean Mathematical Society, 48, 23–31. doi:10.4134/JKMS.2011.48.1.023
- Mirzaie, R., & Kashani, S. M. B. (2002). On cohomogeneity one flat Riemannian manifolds. Glasgow Mathematical Journal, 44, 185–190. doi:10.1017/S0017089502020189
- Podesta, F., & Spiro, A. (1996). Some topological properties of cohomogeneity one Riemannian manifolds with negative curvature. Annals of Global Analysis and Geometry, 14, 69–79. doi:10.1007/BF00128196