; The laws of black hole mechanics, initially proved for event horizons, are generalized to isolated horizons. Expressions are derived for the mass of a stationary axisymmetric solution of the Einstein equations containing a black hole surrounded by matter and for the difference in mass … Black hole thermodynamics wiki | TheReaderWiki Statements. The Four Laws of Black Hole Mechanics - NASA/ADS laws of black hole mechanics The four "'laws of black hole mechanics "'are physical properties that black holes are believed to satisfy. The Four Laws of Black Hole Mechanics Pricing. Introduction It is generally believed that a gravitationally collapsing body will give rise to a black hole and that …