Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Yurov, Valerian A."'
Publikováno v:
Universe 2023, 9(1), 30
We demonstrate that the cosmological arrow of time is the cause for the arrow of time associated with the retarded radiation. This implies that the proposed mathematical model serves to confirm the hypothesis of Gold and Wheeler that the stars radiat
Externí odkaz:
http://arxiv.org/abs/2301.07508
Autor:
Yurov, Artyom, Yurov, Valerian
Publikováno v:
Symmetry 2021, 13(11), 2095
We demonstrate the way to derive the second Painlev\'e equation $P_2$ and its B\"acklund transformations from the deformations of the Nonlinear Schr\"odinger equation (NLS), all the while preserving the strict invariance with respect to the Schlesing
Externí odkaz:
http://arxiv.org/abs/2212.14434
Autor:
Yurov, Artyom, Yurov, Valerian
Publikováno v:
Symmetry 2021, 13(2), 237
This article is dedicated to establishing a novel approach to the cosmological constant, in which it is treated as an eigenvalue of a certain Sturm--Liouville problem. The key to this approach lies in the proper formulation of physically relevant bou
Externí odkaz:
http://arxiv.org/abs/2212.14419
Publikováno v:
Symmetry 2020, 12(12), 211
We begin by introducing a new procedure for construction of the exact solutions to Cauchy problem of the real-valued (hyperbolic) Novikov-Veselov equation which is based on the Moutard symmetry. The procedure shown therein utilizes the well-known Air
Externí odkaz:
http://arxiv.org/abs/2212.14406
Autor:
Yurov, Artyom, Yurov, Valerian
Publikováno v:
Eur. Phys. J. C (2019) 79: 771
In this article we present a new outlook on the cosmology, based on the quantum model proposed by M. Hall, D.-A. Deckert and H. Wiseman (HDW). In continuation of the idea of that model we consider finitely many classical homogeneous and isotropic uni
Externí odkaz:
http://arxiv.org/abs/1901.01873
Autor:
Yurov, Artyom, Yurov, Valerian
Publikováno v:
Phys. Lett. A, 383, 2571-2578 (2019)
In this article we take a close look at three types of transformations usable in the Schwarzschild black hole perturbation theory: a standard (DT), a binary (BDT) and a generalized (GDT) Darboux transformations. In particular, we discuss the absolute
Externí odkaz:
http://arxiv.org/abs/1809.10279
Publikováno v:
Eur. Phys. J. C (2018) 78: 542
The article is dedicated to one of the most undeservedly overlooked properties of the cosmological models: the behaviour at, near and due to a jump discontinuity. It is most interesting that while the usual considerations of the cosmological dynamics
Externí odkaz:
http://arxiv.org/abs/1710.05796
We consider the well-known Boltzmann brains problem in frames of simple phantom energy models with little rip and big rip singularity. It is showed that these models (i) satisfy to observational data and (ii) may be free from Boltzmann brains problem
Externí odkaz:
http://arxiv.org/abs/1309.1969
Publikováno v:
Grav.Cosmol. 20 (2014) no.2, 106-115 (2014)
In this paper we revisit the relationship between the Einstein--Friedman and the Abel equations to demonstrate how it might be applied to the inflationary analysis in a flat Friedman universe filled with a real-valued scalar field. The analysis is pe
Externí odkaz:
http://arxiv.org/abs/1302.6017
Publikováno v:
Astrophysics and Space Science 342, 1 (2012)
Of all the possible ways to describe the behavior of the universe that has undergone a big trip the Wheeler-DeWitt equation should be the most accurate -- provided, of course, that we employ the correct formulation. In this article we start by discus
Externí odkaz:
http://arxiv.org/abs/1208.3828