Zobrazeno 1 - 10
of 1 137
pro vyhledávání: '"Berezin, V"'
Autor:
Berezin, V. A., Dokuchaev, V. I.
Publikováno v:
2023 Class. Quantum Grav. 40 015006
We investigated the possibility of the homogeneous and isotropic cosmological solution in Weyl geometry, which differs from the Riemannian geometry by adding the so called Weyl vector. The Weyl gravity is obtained by constructing the gravitational La
Externí odkaz:
http://arxiv.org/abs/2207.00057
Autor:
Berezin, V. A., Dokuchaev, V. I.
Publikováno v:
IJMPA Vol. 37, No. 20n21, 2243005 (2022)
The homogeneous and isotropic cosmological model in the Weyl conformal geometry is considered. We showed that, despite the conformal invariance, the dust matter is allowed in such a universe. It is shown that the number of dust particles is not conse
Externí odkaz:
http://arxiv.org/abs/2203.04257
Autor:
Berezin, V. A., Ivanova, I. D.
Publikováno v:
Int.J.Mod.Phys.D 31 (2022) 10, 2250077
Using the principle of least action, the motion equations for a singular hypersurface of arbitrary type in quadratic gravity are derived. Equations containing the "external pressure" and the "external flow" components of the surface energy-momentum t
Externí odkaz:
http://arxiv.org/abs/2201.09142
Publikováno v:
Phys. Part. Nuclei 51, 730 (2020)
The Israel equations for thin shells in General Relativity are derived directly from the least action principle. The method is elaborated for obtaining the equations for double layers in quadratic gravity from the least action principle.
Comment
Comment
Externí odkaz:
http://arxiv.org/abs/2009.12400
Publikováno v:
2021 Class. Quantum Grav. 38 045014
We derived the equations for the double layers in Quadratic Gravity, using solely the least action principle. The advantage of our approach is that, in the process of calculation, the $\delta'$-function does not appear at all, and the $\delta$-functi
Externí odkaz:
http://arxiv.org/abs/2008.01813
Publikováno v:
Universe 6, 158 (2020)
The formation of primordial black holes in the early universe in the Brans-Dicke scalar-tensor theory of gravity is investigated. Corrections to the threshold value of density perturbations are found. Above the threshold, the gravitational collapse o
Externí odkaz:
http://arxiv.org/abs/2007.15347
Starting with the idea to describe phenomenologically the particle creation in the strong gravitational fields, we introduced explicitly the particle number nonconservation (= creation law) into the action integral with the corresponding Lagrange mul
Externí odkaz:
http://arxiv.org/abs/1711.08834
Publikováno v:
JETP 124, 446 (2017)
We have analyzed the transformation from initial coordinates $(v,r)$ of the Vaidya metric with light coordinate $v$ to the most physical diagonal coordinates $(t,r)$. An exact solution has been obtained for the corresponding metric tensor in the case
Externí odkaz:
http://arxiv.org/abs/1704.06889
Autor:
Dokuchaev, Vyacheslav, Berezin, V. A.
In this book, the complete classification of the possible types of spherically symmetric global geometries for two types of electrically charged shells are explored. These include the charged shell as a single source of the gravitational field, when
Autor:
Berezin, V. A.1 (AUTHOR), Ivanova, I. D.1 (AUTHOR) pc_mouse@mail.ru
Publikováno v:
Theoretical & Mathematical Physics. Sep2023, Vol. 216 Issue 3, p1287-1298. 12p.
