Results 51 to 60 of about 400,960 (288)

Lagrangian description of the fluid flow with vorticity in the relativistic cosmology

, 1999
We develop the Lagrangian perturbation theory in the general relativistic cosmology, which enables us to take into account the vortical effect of the dust matter.
D.S. Salopek, H. Friedrich, H. Kodama, H. Russ, Hideki Asada, J. Ehlers, J. Ehlers, J. Glanz, J. Parry, J.M. Bardeen, K. Tomita, K. Tomita, K. Tomita, K.M. Croudace, M. Kasai, M. Morita, M. Sasaki, M. Shibata, M. Takada, Masumi Kasai, P.J.E. Peebles, S. Matarrese, S. Matarrese, S. Matarrese, S. Weinberg, T. Buchert, T. Buchert, T. Buchert, T. Buchert, T. Futamase, T. Futamase, Y.B. Zel’dovich   +31 more
core   +1 more source

Newtonian and Post-Newtonian approximations of the k = 0 Friedmann Robertson Walker Cosmology [PDF]

, 1999
In a previous paper we derived a post-Newtonian approximation to cosmology which, in contrast to former Newtonian and post-Newtonian cosmological theories, has a well-posed initial value problem.
E. A. Milne, G. Dautcourt, G. F. R. Ellis, H. Bondi, J. Ehlers, J. L. Synge, O. Heckmann, O. Heckmann, P. Szekeres, P. Szekeres, S. W. Hawking, Tamath Rainsford   +11 more
core   +2 more sources

Entropic force and its cosmological implications

, 2011
We investigate a possibility of realizing the entropic force into the cosmology. A main issue is how the holographic screen is implemented in the Newtonian cosmology.
A. Sheykhi, C. Gao, J.C. Hwang, J.D. Bekenstein, J.M. Bardeen, L. Susskind, L. Susskind, M. Li, R. Bousso, R.G. Cai, R.G. Cai, S. Rasanen, S.W. Hawking, T. Jacobson, T. Padmanabhan, T. Rainsford, Y. Tian, Y.S. Myung, Y.S. Myung, Yun Soo Myung   +19 more
core   +1 more source

Braneworlds and Quantum States of Relativistic Shells [PDF]

, 2007
We review some applications of relativistic shells that are relevant in the context of quantum gravity/quantum cosmology. Using a recently developed approach, the stationary states of this general relativistic system can be determined in the ...
Ansoldi, Stefano
core   +2 more sources

Relativistic Hydrodynamic Cosmological Perturbations [PDF]

General Relativity and Gravitation, 1999
16 pages, no figure, To appear in Gen.
Hwang, Jai-chang, Noh, Hyerim
openaire   +3 more sources

Anselm's Temporal‐Ontological Proof

Noûs, EarlyView.
ABSTRACT In his Reply to Gaunilo, Anselm presented two additional arguments for the existence of God beyond those that appear in the Proslogion. In “The Logical Structure of Anselm's Argument,” Robert M. Adams isolates each. One, he develops into a modal ontological argument along the lines of other 20th century ontological arguments (e.g., those of ...
Daniel Rubio
wiley   +1 more source

Relations between Newtonian and Relativistic Cosmology

Universe
We start with the cosmic Friedmann equations, where we adopt a novel perspective rooted in a Lagrangian formulation, grounded in Newtonian mechanics and the first law of thermodynamics. Our investigation operates under the assumption that the universe is
Jaume de Haro
doaj   +1 more source

Conformal Symmetries of the Strumia–Tetradis’ Metric

Physical Sciences Forum, 2023
In a recent paper, a new conformally flat metric was introduced, describing an expanding scalar field in a spherically symmetric geometry. The spacetime can be interpreted as a Schwarzschild-like model with an apparent horizon surrounding the curvature ...
Pantelis S. Apostolopoulos, Christos Tsipogiannis   +1 more
doaj   +1 more source

Topological acceleration in relativistic cosmology

, 2012
Heuristic approaches in cosmology bypass more difficult calculations that would more strictly agree with the standard Einstein equation. These give us the well-known Friedmann-Lemaitre-Robertson-Walker (FLRW) models, and, more recently, the feedback ...
Roukema, Boudewijn F.
core   +1 more source

Hamilton-Jacobi Mechanics from Pseudo-Supersymmetry [PDF]

, 2007
For a general mechanical system, it is shown that each solution of the Hamilton-Jacobi equation defines an N=2 pseudo-supersymmetric extension of the system, such that the usual relation of the momenta to Hamilton's principal function is the `BPS ...
Townsend, Paul K.
core   +3 more sources