The topologies of event horizons are investigated. Considering the existence of the endpoint of the event horizon, it cannot be differentiable. Then there are the new possibilities of the topology of the event horizon though they are excluded in smooth event horizons. T... View more
 S. W. Hawking and G. F. R. Ellice, The large scale structure of space-time Cambridge University Press, New York, 1973.
 S. W. Hawking, Commun. Math. Phys. 25 (1972)152.
 P. T. Chrusciel and R. M. Wald, Class. Quant. Grav. 11(1994)L147.
 D. Gannon,Gen. Relativ. Gravit. 7 (1976)219.
 J. L. Friedmann, K. Schleich and D. M. Witt, Phys. Rev. Lett. 71 (1993)1486.
 T. Jacobson and S. Venkataramani, Class. Quantum Grav. 12 (1995)1055.
 S. Browdy and G. J. Galloway, J. Math. Phys. 36 (1995)4952.
 S. A. Hughes, C. R. Keeton, P. Walker, K. Walsh, S. L. Shapiro and S. A. Teukolsky, Phys. Rev. D49 (1994)4004, A. M. Abrahams, G. B. Cook, S. L. Shapiro and S. A. Teukolsky Phys. Rev. D49 (1994)5153, S. L. Shapiro, S. A. Teukolsky and J. Winicour Phys. Rev. D52 (1995)6982.
 P. Anninos, D. Bernstein, S, Brandt, J. Libson, J. Mass´o, E. Seidel, L. Smarr, W. Suen, and P. WalkerPhys. Rev. Lett. 74 (1995)630.
 R. M. Wald, General Relativity University of Chicago Press, Chicago, 1984.