5 Applications of the Coset Structure 

The -model structure is responsible for various distinguished features of the stationary Einstein-Maxwell (EM) system and related self-gravitating matter models. This section is devoted to a brief discussion of some applications: We argue that the Mazur identity [133], the quadratic mass formulas [89] and the Israel-Wilson class of stationary black holes [102], [145] owe their existence to the -model structure of the stationary field equations.

• 5.1 The Mazur Identity
• 5.2 Mass Formulae
• 5.3 The Israel-Wilson Class

Stationary Black Holes: Uniqueness and Beyond Markus Heusler http://www.livingreviews.org/lrr-1998-6 © Max-Planck-Gesellschaft. ISSN 1433-8351 Problems/Comments to livrev@aei-potsdam.mpg.de