arXiv
Open Access
2021
Comment on "An axially symmetric spacetime with causality violation [Phys. Scr. 96 (07), 075208 (2021)], arXiv:2004.13769[gr-qc]"
Faizuddin Ahmed
Abstrak
Recently, an axially symmetric spacetime with causality violation is appeared in Ref. [1]. There, author presented a type III metric with vanishing expansion, shear and twist. The matter-energy represents a pure radial field with a negative cosmological constant. The spacetime is asymptotically anti-de Sitter space in the radial direction. Actually, this work with different for the metric was already published in Ref. [4]. Therefore, the current paper Ref. [1] is a duplicate one of the previous work.
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Faizuddin Ahmed
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- 2021
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