ar X iv : d g - ga / 9 70 60 06 v 1 6 J un 1 99 7 ON THE HOMOTOPY INVARIANCE OF L 2 TORSION FOR COVERING SPACES

ar X iv : d g - ga / 9 51 00 06 v 1 2 3 O ct 1 99 5 GROUP SYSTEMS , GROUPOIDS , AND MODULI SPACES OF PARABOLIC BUNDLES

ar X iv : g r - qc / 9 70 80 51 v 1 2 1 A ug 1 99 7 Torsion and the Electromagnetic Field

In the framework of the teleparallel equivalent of general relativity, we study the dynamics of a gravitationally coupled electromagnetic field. It is shown that, besides being able to be minimally coupled to torsion, the electromagnetic field, through its energy–momentum tensor, is also able to produce torsion. Furthermore, it is shown that this kind of coupling of the electromagnetic field wi...

ar X iv : a st ro - p h / 97 06 06 5 v 1 6 J un 1 99 7 Discovery of the X - Ray Afterglow of the Gamma - Ray Burst of February 28 1997

ar X iv : d g - ga / 9 71 20 03 v 1 2 D ec 1 99 7 The Positive Fundamental Group of Sp ( 2 ) and Sp ( 4 )

In this paper, we examine the homotopy classes of positive loops in Sp(2) and Sp(4). We show that two positive loops are homotopic if and only if they are homotopic through positive loops.

ar X iv : h ep - l at / 9 70 60 06 v 1 6 J un 1 99 7 1 BI - TP 97 / 19 June 1997 On QCD Thermodynamics with Improved Actions ∗

We will discuss recent advances in the calculation of thermodynamic observables using improved actions. In particular, we will discuss the calculation of the equation of state of the SU (3) gauge theory, the critical temperature in units of the string tension, the surface tension and the latent heat at the deconfinement transition. We also will present first results from a calculation of the eq...