Zobrazeno 1 - 10
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pro vyhledávání: '"Govinder, Keshlan"'
Publikováno v:
In Heliyon 30 October 2024 10(20)
Publikováno v:
In Annals of Physics May 2023 452
Autor:
Okelola, Michael, Govinder, Keshlan
Mathematical models with time dependent parameters are of great interest in financial Mathematics because they capture real life scenarios in the financial market. In this study, via the Lie group technique, we analyse evolution-type equations with t
Externí odkaz:
http://arxiv.org/abs/1503.03194
Akademický článek
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Autor:
Wagh, Sanjay M, Govinder, Keshlan S
It is well-known \cite{mtbh} that {\em all} black hole solutions of General Relativity are of Petrov-type D. It may thus be expected that the spacetime of {\em physically realizable} spherical gravitational collapse is also of Petrov-type D. We show
Externí odkaz:
http://arxiv.org/abs/gr-qc/0209038
We argue that a particular spacetime, a spherically symmetric spacetime with hyper-surface orthogonal, radial, homothetic Killing vector, is a physically meaningful spacetime that describes the problem of spherical gravitational collapse in its full
Externí odkaz:
http://arxiv.org/abs/gr-qc/0209001
Autor:
Wagh, Sanjay M., Govinder, Keshlan S.
We show that the existence of appropriate spatial homothetic Killing vectors is directly related to the separability of the metric functions for axially symmetric spacetimes. The density profile for such spacetimes is (spatially) arbitrary and admits
Externí odkaz:
http://arxiv.org/abs/gr-qc/0201018
Autor:
Wagh, Sanjay M., Govinder, Keshlan S.
We show that all known naked singularities in spherically symmetric self-similar spacetimes arise as a result of singular initial matter distribution. This is a result of the peculiarity of the coordinate transformation that takes these spacetimes in
Externí odkaz:
http://arxiv.org/abs/gr-qc/0112064
Autor:
Wagh, Sanjay M., Govinder, Keshlan S.
Publikováno v:
Gen.Rel.Grav. 38 (2006) 1253-1259
Self-similar spacetimes are of importance to cosmology and to gravitational collapse problems. We show that self-similarity or the existence of a homothetic Killing vector field for spherically symmetric spacetimes implies the separability of the spa
Externí odkaz:
http://arxiv.org/abs/gr-qc/0112035
Autor:
Gumede, Sfundo C.1,2 (AUTHOR) gumedesc@mut.ac.za, Govinder, Keshlan S.1 (AUTHOR) govinder@ukzn.ac.za, Maharaj, Sunil D.1 (AUTHOR) maharaj@ukzn.ac.za
Publikováno v:
Entropy. May2022, Vol. 24 Issue 5, pN.PAG-N.PAG. 16p.