Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Nilsson, Ulf S."'
Autor:
Goliath, Martin, Nilsson, Ulf S.
Publikováno v:
J.Math.Phys. 41 (2000) 6906-6917
We consider the problem of late-time isotropization in spatially homogeneous but anisotropic cosmological models when the source of the gravitational field consists of two non-interacting perfect fluids -- one tilted and one non-tilted. In particular
Externí odkaz:
http://arxiv.org/abs/gr-qc/0004069
Publikováno v:
Gen.Rel.Grav. 32 (2000) 1319-1343
To understand the observational properties of cosmological models, in particular, the temperature of the cosmic microwave background radiation, it is necessary to study their null geodesics. Dynamical systems theory, in conjunction with the orthonorm
Externí odkaz:
http://arxiv.org/abs/gr-qc/9908062
Publikováno v:
Phys.Rev. D61 (2000) 043504
A complete global analysis of spatially-flat, four-dimensional cosmologies derived from the type IIA string and M-theory effective actions is presented. A non--trivial Ramond-Ramond sector is included. The governing equations are written as a dynamic
Externí odkaz:
http://arxiv.org/abs/hep-th/9908102
Publikováno v:
Class.Quant.Grav.15:2841,1998
Einstein's field equations for timelike self-similar spherically symmetric perfect-fluid models are investigated. The field equations are rewritten as a first-order system of autonomous differential equations. Dimensionless variables are chosen in su
Externí odkaz:
http://arxiv.org/abs/gr-qc/9811065
Publikováno v:
Class.Quant.Grav. 15 (1998) 167
Einstein's field equations for spatially self-similar spherically symmetric perfect-fluid models are investigated. The field equations are rewritten as a first-order system of autonomous differential equations. Dimensionless variables are chosen in s
Externí odkaz:
http://arxiv.org/abs/gr-qc/9811064
Autor:
Nilsson, Ulf S., Uggla, C.
Einstein's field equations for stationary Bianchi type II models with a perfect fluid source are investigated. The field equations are rewritten as a system of autonomous first order differential equations. Dimensionless variables are subsequently in
Externí odkaz:
http://arxiv.org/abs/gr-qc/9702039
Autor:
Nilsson, Ulf S., Uggla, Claes
Publikováno v:
In Annals of Physics 15 December 2000 286(2):278-291
Autor:
Nilsson, Ulf S., Uggla, Claes
Publikováno v:
In Annals of Physics 15 December 2000 286(2):292-319
Autor:
Nilsson, Ulf S., Uggla, Claes
Publikováno v:
Journal of Mathematical Physics; Jun98, Vol. 39 Issue 6, p3336, 11p, 10 Diagrams, 5 Graphs
Autor:
Nilsson, Ulf S., Uggla, Claes
Publikováno v:
Classical & Quantum Gravity; Oct1997, Vol. 14 Issue 10, p1-1, 1p