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Conformal vector fields over Lyra manifold of locally rotationally symmetric Bianchi type I spacetimes

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Abstract

In this paper the conformal vector fields (CVFs) of locally rotationally symmetric (LRS) Bianchi type-I spacetime in Lyra geometry have been explored. The obtained CVFs are admitted by some special classes of the metrics of LRS Bianchi type-I spactime. The obtained metrics are then utilized into Einstein field equations (EFEs) of Lyra geometry to find the displacement vector (DV), density and pressure in the case of a perfect fluid matter. Some physical quantities like expansion scalar, Hubble parameter, shear scalar, average anisotropy parameter, deceleration parameter and the relative anisotropy of the obtained metrics are also discussed. It has been observed that conformal symmetry plays a vital role at the era of evolution of cosmos.

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Authors and Affiliations

  1. Department of Basic Sciences and Islamiat, University of Engineering and Technology Peshawar, Peshawar, Pakistan

    Amjad Ali & Imran Khan

  2. Department of Mathematics, University of Peshawar, Peshawar, Khyber Pukhtoonkhwa, Pakistan

    Suhail Khan

Authors
  1. Amjad Ali
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  2. Imran Khan
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  3. Suhail Khan
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Correspondence to Suhail Khan.

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Ali, A., Khan, I. & Khan, S. Conformal vector fields over Lyra manifold of locally rotationally symmetric Bianchi type I spacetimes. Eur. Phys. J. Plus 135, 499 (2020). https://doi.org/10.1140/epjp/s13360-020-00518-1

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  • DOI: https://doi.org/10.1140/epjp/s13360-020-00518-1

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