Izvorni znanstveni članak
A study of four and higher-dimensional cosmological models in Lyra geometry
F. Rahaman
; Khodar Bazar, Baruipur 743302, 24-Parganas (S), West Bengal, India; Department of Mathematics, Jadavpur University, Calcutta 700032, India; Department of Mathematics, N. V. College, Nabadwip, Nadia, West Bengal, India
S. Chakraborty
; Department of Mathematics, Jadavpur University, Calcutta 700032, India
N. Begum
; Department of Mathematics, Jadavpur University, Calcutta 700032, India
M. Hossain
; v
M. Kalam
; Department of Mathematics, Jadavpur University, Calcutta 700032, India
Sažetak
Exact cosmological solutions for spherically symmetric models, both in four and higher dimensions are obtained within the framework of Lyra geometry. It is observed that there is no singularity at finite past in our four-dimensional model. For the five-dimensional model, the diminision of extra dimension with the evolution of the Universe is exhibited. The physical behaviour of the models is examined in vacuum (for the four-dimensional case) and in the presence of perfect fluids (for both four- and five-dimensional models).
Ključne riječi
Lyra geometry; spherically symmetric models; four and higher dimensions
Hrčak ID:
304067
URI
Datum izdavanja:
3.3.2002.
Posjeta: 147 *