7 Some Applications

The σ-model structure is responsible for various distinguished features of the stationary EM system and related self-gravitating matter models. This section is devoted to a brief discussion of some applications. We show how the Mazur identity [230Jump To The Next Citation Point], the quadratic mass formulae [153Jump To The Next Citation Point] and the Israel–Wilson–Perjés class of stationary black holes [179Jump To The Next Citation Point, 267Jump To The Next Citation Point] arise from the σ-model structure of the stationary field equations.

 7.1 The Mazur identity
 7.2 Mass formulae
 7.3 The Israel–Wilson–Perjés class

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