Summary
Theγ A-metric in a canonical form is a solitonic solution to the Einstein field equations in vacuum and represents a semi-infinite Weyl source located on the lower half on the z-axis forγ ± 0;γ ± 1. The co-ordinate transformationr → (λr)n,t →λ n(1-λ)t withn = 1, 2,..., as λ → 0 is a mapping which maps the Weyl source with density γ/2 and length 2m into a semi-infinite line source with densityγ/2, located on the lower half of the z-axis. When terms of the orderλ n(3-λ) are kept, a nonvacuum solution is taken. It satisfies certain conditions of energy for different values of the angle θ and the parameter γ.
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References
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Papadopoulos, D. Effects of a co-ordinate mapping on a particular glass of static, axially symmetric solutions to the Einstein equations. Lett. Nuovo Cimento 44, 497–502 (1985). https://doi.org/10.1007/BF02746748
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DOI: https://doi.org/10.1007/BF02746748