Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Demaret, Jacques"'
Autor:
Di Pietro, Elisa, Demaret, Jacques
Publikováno v:
Int.J.Mod.Phys. D10 (2001) 231-237
Quintessence is often invoked to explain the universe acceleration suggested by the type Ia supernovae observations. The aim of this letter is to study the validity of using a constant equation of state for quintessence models. We shall show that thi
Externí odkaz:
http://arxiv.org/abs/gr-qc/9908071
Autor:
Di Pietro, Elisa, Demaret, Jacques
Publikováno v:
Int.J.Mod.Phys. D8 (1999) 349-361
We apply the scale factor duality transformations introduced in the context of the effective string theory to the anisotropic Bianchi-type models. We find dual models for all the Bianchi-types [except for types $VIII$ and $IX$] and construct for each
Externí odkaz:
http://arxiv.org/abs/gr-qc/9903063
Autor:
Demaret, Jacques, Di Pietro, Elisa
Publikováno v:
Gen.Rel.Grav. 31 (1999) 323-347
In the first part of the present paper, we show that O(d,d)-invariance usually known in a homogeneous cosmological background written in terms of proper time can be extended to backgrounds depending on one or several coordinates (which may be any spa
Externí odkaz:
http://arxiv.org/abs/gr-qc/9811066
The essence of the method of physics is inseparably connected with the problem of interplay between local and global properties of the universe. In the present paper we discuss this interplay as it is present in three major departments of contemporar
Externí odkaz:
http://arxiv.org/abs/gr-qc/9702047
Autor:
Gotay, Mark J., Demaret, Jacques
Publikováno v:
Nucl.Phys.Proc.Suppl. 57 (1997) 227-230
We discuss to what extent classical singularities persist upon quantization in two simple cosmological models.
Comment: 4 pps., LaTeX2e. Substantial revisions. To appear in: Proc. of the Second Conference on Constrained Dynamics and Quantum Grav
Comment: 4 pps., LaTeX2e. Substantial revisions. To appear in: Proc. of the Second Conference on Constrained Dynamics and Quantum Grav
Externí odkaz:
http://arxiv.org/abs/gr-qc/9605025
Autor:
Demaret, Jacques, Querella, Laurent
Publikováno v:
Class.Quant.Grav. 12 (1995) 3085-3102
We use Boulware's Hamiltonian formalism of quadratic gravity theories in order to analyze the classical behaviour of Bianchi cosmological models for a Lagrangian density containing quadratic terms in the curvature. For this purpose we define a canoni
Externí odkaz:
http://arxiv.org/abs/gr-qc/9510065
Autor:
Demaret, Jacques
« Le point de départ de l’analyse métaphysique, ce ne sont pas des textes, mais la réalité elle-même, dans sa splendeur ». Jusqu’à l’avènement de la cosmologie relativiste en 1917, la réponse aux grandes interrogations de nature méta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=openedition_::b6ffd361ed632c0601b2e7451e589ac5
http://books.openedition.org/pusl/5669
http://books.openedition.org/pusl/5669
Publikováno v:
International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology; Apr2001, Vol. 10 Issue 2, p231, 7p
Autor:
Szydlowski, Marek, Demaret, Jacques
Publikováno v:
General Relativity & Gravitation; Jun1999, Vol. 31 Issue 6, p897-911, 15p
Autor:
Demaret, Jacques, Pietro, Elisa
Publikováno v:
General Relativity & Gravitation; Mar1999, Vol. 31 Issue 3, p323-347, 25p