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Surface deformations, their square root and the signature of spacetime

2008; Linguagem: Inglês

10.1007/3-540-09238-2_90

Claudio Teitelboim,

Black Holes and Theoretical Physics

The formulation of general relativity in terms of surface deformations and its extension to supergravity are briefly reviewed. The role of the spacetime signature e is discussed. It is pointed out that ε may be used as a perturbation parameter. The "free" theory corresponds to ε = 0, which is halfway between hyperbolic (ε = −1) and Euclidean (ε = +1) spacetime.