ar X iv : 0 80 5 . 23 84 v 1 [ gr - q c ] 1 5 M ay 2 00 8 Current status of the CLIO project

ar X iv : 0 71 2 . 38 38 v 3 [ gr - q c ] 3 1 M ay 2 00 8 General Transformation Formulas for Fermi - Walker Coordinates

ar X iv : 0 80 5 . 28 58 v 1 [ gr - q c ] 1 9 M ay 2 00 8 DISCRETE DIFFERENTIAL FORMS FOR COSMOLOGICAL SPACE - TIMES

In this article we describe applications of the numerical method of discrete differential forms in computational GR. In particular we consider the initial value problem for vacuum space-times that admit plane gravitational waves. As described in an earlier paper the discrete differential form approach can provide accurate results in spherically symmetric space-times [28]. Moreover it is manifes...

ar X iv : 0 80 5 . 45 05 v 1 [ gr - q c ] 2 9 M ay 2 00 8 Kerr initial data

Exploiting a 3+1 analysis of the so-called Mars-Simon tensor, conditions on a vacuum initial data set ensuring that its development is isometric to a subset of the Kerr spacetime are found. These conditions are expressed in terms of the vanishing of a positive scalar function defined on the initial data hypersurface. Applications of this result are discussed. PACS numbers: 04.20.Ex, 04.20-q, 04...

ar X iv : 0 80 5 . 35 71 v 1 [ gr - q c ] 2 3 M ay 2 00 8 Contribution of Blackhole Entropy Towards Acceleration Of The Universe ∗

In a recent model Choudhury proposed that a collapsing matter generates an adiabatic pressure which can be used to explain the acceleration of the physical universe under certain approximation. In this work we superimpose the core pressure generated through the entropy of the blackhole. We have ignored the blackhole internal energy change during this process. We have then calculated both Hubble...

ar X iv : 0 80 5 . 36 42 v 1 [ gr - q c ] 2 3 M ay 2 00 8 From Dark Energy & Dark Matter to Dark Metric

General Relativity isn’t the definitive theory of Gravitation. The attempts to recover it, with respect to the latest observative data, leads to very strange physical entites as the Dark Energy & Dark Matter. On the other hand, the attempts to produce generalized theories gives rise to mathematical difficulties that need workarounds that generate problem from the interpretative viewpoint. We pr...