This leads to a modification of the original laws of black hole mechanics : for instance, as the second law of black hole mechanics becomes part of the second law of thermodynamics, it is possible for black hole area to decrease as long as other processes ensure that, overall, entropy increases.
12.
Eventually, the hope is to use a suitable defined quasi-local mass to give a more precise formulation of the hoop conjecture, prove the so-called Penrose inequality for black holes ( relating the black hole's mass to the horizon area ) and find a quasi-local version of the laws of black hole mechanics.
