ar X iv : g r - qc / 9 60 90 07 v 2 2 3 N ov 1 99 6 The Cosmic Censor Forbids Naked Topology

ar X iv : g r - qc / 9 60 90 07 v 1 1 S ep 1 99 6 The Cosmic Censor Forbids Naked Topology

For any asymptotically flat spacetime with a suitable causal structure obeying Penrose's cosmic censorship conjecture (weak form) and satisfying conditions guaranteeing focus-ing of complete null geodesics, we prove that active topological censorship holds. We do not assume global hyperbolicity, and therefore make no use of Cauchy surfaces and their topology. Instead, we replace this with two u...

ar X iv : g r - qc / 9 51 10 48 v 1 1 6 N ov 1 99 5 Two lectures on Two - Dimensional Gravity ∗

ar X iv : g r - qc / 9 81 10 89 v 1 2 6 N ov 1 99 8 Spectral methods in general relativistic astrophysics

We present spectral methods developed in our group to solve three-dimensional partial differential equations. The emphasis is put on equations arising from astro-physical problems in the framework of general relativity.

ar X iv : g r - qc / 9 71 10 36 v 1 1 1 N ov 1 99 7 Local Cosmic String In Generalised Scalar Tensor Theory

A recent investigation shows that a local gauge string with a phenomenological energy momentum tensor, as prescribed by Vilenkin, is inconsistent in Brans-Dicke theory. In this work it has been shown that such a string is consistent in a more general scalar tensor theory where ω is function of the scalar field.A set of solutions of full nonlinear Einstein's equations for interior region of such...

ar X iv : g r - qc / 9 71 10 45 v 1 1 3 N ov 1 99 7 Gravitational Capture of Cosmic Strings by a Black Hole ∗

The gravitational interaction of an infinitely long cosmic string with a Schwarzschild black hole is studied. We consider a straight string that is initially at a great distance and moving at some initial velocity v (0 < v < c) towards the black hole. The equations of motion of the string are solved numerically to obtain the dependence of the capture impact parameter on the initial velocity. PA...