ar X iv : a st ro - p h / 02 11 35 8 v 1 1 5 N ov 2 00 2 1 Astrophysical sources of high energy neutrinos

ar X iv : a st ro - p h / 02 11 45 7 v 1 2 0 N ov 2 00 2 Time variation of fundamental constants : two phenomenological models

Time variation of fundamental constants, a strong signal of new physics, is analyzed comparing extant data with two phenomenological models. Results are discussed.

ar X iv : a st ro - p h / 02 11 56 8 v 1 2 6 N ov 2 00 2 1 Properties of tangential and radial angles of muons in EAS ∗

Tangential and radial angles of muons in EAS, a useful concept in investigation of the muon production height, can be used also for the investigation of the muon momenta. A parameter ζ, being a combination of tangential and radial angles, is introduced and its possible applications in investigation of muons in showers are presented.

ar X iv : a st ro - p h / 01 11 13 6 v 1 7 N ov 2 00 1 1 Active Optics in Modern , Large Optical Telescopes

ar X iv : a st ro - p h / 97 11 24 4 v 1 2 0 N ov 1 99 7 POPULATION SYNTHESIS OF HIGH ENERGY TRANSIENTS RELATIVISTIC BINARY MERGING RATES

ar X iv : a st ro - p h / 04 11 59 5 v 1 2 2 N ov 2 00 4 Geometry of Dynamical Systems †

We propose a geometrical approach to the investigation of Hamiltonian systems on (Pseudo) Riemannian manifolds. A new geometrical criterion of instability and chaos is proposed. This approach is more generic than well known reduction to the geodesic flow. It is applicable to various astrophysical and cosmological problems.