Edward Malec and Niall Ó Murchadha 2004 Class. Quantum Grav. 21 5777 doi:10.1088/0264-9381/21/24/007
Edward Malec1,3 and Niall Ó Murchadha2,3
Show affiliationsThe Jang equation in the spherically symmetric case reduces to a first-order equation. This permits an easy analysis of the role apparent horizons play in the (non)existence of solutions. We demonstrate that the proposed derivation of the Penrose inequality based on the Jang equation cannot work in the spherically symmetric case. Thus it is fruitless to apply this method, as it stands, to the general case. We also show that those analytic criteria for the formation of horizons that are based on the use of the Jang equation are of limited validity for the proof of the trapped surface conjecture.
Issue 24 (21 December 2004)
Received 9 August 2004, in final form 26 October 2004
Published 22 November 2004
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