/ 99 05 17 1 v 2 1 7 Se p 19 99 Energy Levels of Classical Interacting Fields in a Finite Domain in 1 + 1 Dimension

ar X iv : h ep - p h / 99 05 24 9 v 4 1 4 Se p 19 99 BI - TP 99 / 12 Two - loop self - energy master integrals on shell

Analytic results for the complete set of two-loop self-energy master integrals on shell with one mass are calculated.

ar X iv : a st ro - p h / 99 09 17 7 v 1 1 0 Se p 19 99 Status of VLBI Observations at 1 mm Wavelength and Future Prospects

ua nt - p h / 99 01 05 1 v 1 1 7 Ja n 19 99 Green ’ s Function of the Relativistic Coulomb System via Duru - Kleinert Method

In this paper the fixed-energy amplitude (Green's function) of the relativistic Coulomb system is solved by Duru-Kleinert (DK) method. In the course of the calculations we observe an equivalence between the relativistic Coulomb system and a radial oscillator.

ep - t h / 99 09 12 3 v 1 1 7 Se p 19 99 Correct Treatment of 1 ( η · k ) p Singularities in the Axial Gauge Propagator Satish

X iv : g r - qc / 9 70 50 46 v 1 1 7 M ay 1 99 7 Integrable Multicomponent Perfect Fluid Multidimensional Cosmology II : Scalar Fields

We consider anisotropic cosmological models with an universe of dimension 4 or more, fac-torized into n ≥ 2 Ricci-flat spaces, containing an m-component perfect fluid of m non-interacting homogeneous minimally coupled scalar fields under special conditions. We describe the dynamics of the universe: It has a Kasner-like behaviour near the singularity and isotropizes during the expansion to infin...