ar X iv : g r - qc / 0 10 30 97 v 3 1 7 D ec 2 00 1 Who is the Inflaton ? ∗

ar X iv : g r - qc / 0 11 20 12 v 1 7 D ec 2 00 1 RELATIVISTIC GRAVITY WITH A DYNAMICAL PREFERRED FRAME

ar X iv : g r - qc / 0 31 20 38 v 1 7 D ec 2 00 3 Strings and Branes under Microscope

It is shown that in the standard vacuum 5D Kaluza-Klein gravity there is a wormhole-like solution which look like a string attached to two D-branes. The asymptotical behaviour of the corresponding metric is investigated.

ar X iv : g r - qc / 0 11 20 07 v 1 7 D ec 2 00 1 Report on A 5 . Computer Methods

Session A5 on numerical methods contained talks on colliding black holes, critical phenomena, investigation of singularities, and computer algebra .

ar X iv : g r - qc / 0 51 20 76 v 1 1 3 D ec 2 00 5 Group averaging , positive definiteness and superselection sectors 1

I discuss group averaging as a method for quantising constrained systems whose gauge group is a noncompact Lie group. Focussing on three case studies, I address the convergence of the averaging, possible indefiniteness of the prospective physical inner product and the emergence of superselection sectors.

ar X iv : g r - qc / 0 41 21 17 v 1 2 3 D ec 2 00 4 A quantum mass - spectrum of Kerr black hole : superstrings

Using thermal quantization of geodesics confined under horizons and reasonable conjecture on massless modes, we evaluate quantum spectrum of Kerr black hole masses compatible with superstring symmetries.