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Podolsky, J., Svarc, R. and Maeda, H. (2019) All Solutions of Einstein’s Equations in 2 + 1 Dimensions: Λ-Vacuum, Pure Radiation, or Gyratons. Classical and Quantum Gravity, 36, 27 p.
https://doi.org/10.1088/1361-6382/aaef51

has been cited by the following article:

• TITLE: Hyperverse, 5-Dimensional Gravity and Multiverses as Nested Gogberashvili Shells

  AUTHORS: Igor Yu. Potemine

  KEYWORDS: 5-Dimensional Gravity, Black Hole, Multiverse, Spherical Shell

  JOURNAL NAME: Journal of High Energy Physics, Gravitation and Cosmology, Vol.8 No.4, October 13, 2022

  ABSTRACT: We consider the Hyperverse as a collection of multiverses in 5-dimensional spacetime with gravitational constant G. Each multiverse in our simplified model is a bouquet of nested spherical Gogberashvili shells. If gk is the gravitational constant of a thin shell Sk and εk, its thickness then G ~ εkgk. The physical universe is supposed to be one of those shells inside the local nested bouquet called Local Multiverse. We relate this construction to Robinson-Trautman metrics describing expanding spacetimes with spherical gravitational waves. Supermassive astronomical black holes, located at cores of elliptic/spiral galaxies, are also conjecturally described within this theory. Our constructions are equally consistent with the modern theory of cosmological coupling.