Phys. Rev. Lett. 57, 397–399 (1986)Third Law of Black-Hole Dynamics: A Formulation and ProofReceived 19 May 1986; published in the issue dated 28 July 1986 It is shown that no continuous process in which the energy tensor of accreted matter remains bounded and satisfies the weak energy condition in a neighborhood of the apparent horizon can reduce the surface gravity of a black hole to zero within a finite advanced time. This gives a precise expression to the third law of black-hole mechanics. © 1986 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.57.397
DOI:
10.1103/PhysRevLett.57.397
PACS:
04.20.Cv, 97.60.Lf
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