Zobrazeno 1 - 10
of 14 718
pro vyhledávání: '"conformal transformations"'
Autor:
Masters, Ada, Rennie, Adam
We extend unbounded Kasparov theory to encompass conformal group and quantum group equivariance. This new framework allows us to treat conformal actions on both manifolds and noncommutative spaces. As examples, we present unbounded representatives of
Externí odkaz:
http://arxiv.org/abs/2412.17220
Publikováno v:
J. Phys. A: Math. Theor. 57 (2024) 485203
We propose a generalization of two classes of Lie-Hamilton systems on the Euclidean plane to two-dimensional curved spaces, leading to novel Lie-Hamilton systems on Riemannian spaces (flat $2$-torus, product of hyperbolic lines, sphere and hyperbolic
Externí odkaz:
http://arxiv.org/abs/2407.01500
The unique Nature of the Lorentz group in four dimensions is the root cause of the many remarkable properties of the Einstein spacetimes, in particular their operational structure on the 2-forms. We show how this operational structure can be used for
Externí odkaz:
http://arxiv.org/abs/2403.11527
Autor:
Dahal, Pravin Kumar1 (AUTHOR) pravin-kumar.dahal@hdr.mq.edu.au, Maharana, Swayamsiddha1 (AUTHOR)
Publikováno v:
European Physical Journal C -- Particles & Fields. Aug2024, Vol. 84 Issue 8, p1-17. 17p.
Publikováno v:
Journal of Cosmology and Astroparticle Physics, JCAP04(2024)064
We study conformal transformations in the most general parity-preserving models of the New General Relativity type. Then we apply them to analysis of cosmological perturbations in the (simplest) spatially flat cosmologies. Strong coupling issues arou
Externí odkaz:
http://arxiv.org/abs/2312.16021
Autor:
Cortés, Vicente, Leistner, Thomas
Publikováno v:
SIGMA 20 (2024), 084, 12 pages
A conformal transformation of a semi-Riemannian manifold is essential if there is no conformally equivalent metric for which it is an isometry. For Riemannian manifolds the existence of an essential conformal transformation forces the manifold to be
Externí odkaz:
http://arxiv.org/abs/2309.11184
The Brans-Dicke field in Non-metricity gravity: Cosmological solutions and Conformal transformations
Autor:
Paliathanasis, Andronikos
We consider the Brans-Dicke theory in non-metricity gravity, which belongs to the family of symmetric teleparallel scalar-tensor theories. Our focus lies in exploring the implications of the conformal transformation, as we derive the conformal equiva
Externí odkaz:
http://arxiv.org/abs/2310.16357
Autor:
Chen, Aoran
We start by taking the analytical approach to discuss how the minimizer of Yamabe functional provides constant scalar curvature and its relationship with the Sobolev Space $W^{1,2}.$ Then, after demonstrating the importance of the sphere $S^n$, with
Externí odkaz:
http://arxiv.org/abs/2309.02397
Autor:
Araneda, Bernardo
We give a simple prescription for relating different solutions to the zero-rest-mass field equations in conformally flat space-time via complex conformal transformations and changes in reality conditions. We give several examples including linearized
Externí odkaz:
http://arxiv.org/abs/2305.08756
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 8, Pp 1-17 (2024)
Abstract In this second part of our two-series on extracting the Hawking temperature of dynamical black holes, we focus into spacetimes that are conformal transformations of static spacetimes. Our previous investigation builds upon the Unruh–Hawkin
Externí odkaz:
https://doaj.org/article/872b34b87b054b3da575ded8c3abee9b