On the Matching Conditions for the Collapsing Cylinder

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We review the matching conditions for a collapsing anisotropic cylindrical perfect fluid, recently discussed in the literature (2005 {\it Class. Quantum Grav.} {\bf 22} 2407). It is shown that radial pressure vanishes on the surface of the cylinder, contrary to what is asserted in that reference. The origin of this discrepancy is to be found in a mistake made in one step of the calculations. Some comments about the relevance of this result in relation to the momentum of Einstein--Rosen waves are presented.
Submitted to Class. Quant. Grav. as a comment

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General Relativity and Quantum Cosmology

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http://salesiana.dossiersoluciones.com/handle/123456789/201118

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/gr-qc/0611147
 http://arxiv.org/abs/gr-qc/0611147
 Class.Quant.Grav.24:1033,2007
 doi:10.1088/0264-9381/24/4/C01

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arXiv