Evidence for the adiabatic invariance of the black hole horizon area
Mayo, Avraham E.
arxiv: General Relativity and Quantum Cosmology | Astrophysics::High Energy Astrophysical Phenomena
Some examples in support of the conjecture that the horizon area of a near equilibrium black hole is an adiabatic invariant are described. These clarify somewhat the conditions under which the conjecture would be true.