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Black-holes, Duality and Supersymmetry
E. Alvarez, P. Meessen, T. Ortin
In order to study the discrepancy between the supersymmetry bound and the extremality bound for rotating black holes, the effect of duality transformations on the class of stationa…
Non-Supersymmetric (but) Extreme Black Holes, Scalar Hair and Other Open Problems
Tomas Ortin
We give a brief overview of black-hole solutions in four-dimensional supergravity theories and their extremal and supersymmetric limits. We also address problems like cosmic censor…
Supersymmetry, Trace Anomaly and Naked Singularities
R. Kallosh, T. Ortin
We discuss stationary supersymmetric bosonic configurations of the Einstein-Maxwell theory embedded in supergravity. Some of these configurations, including the Kerr-Newman s…
Killing Spinor Identities
Renata Kallosh, Tomas Ortin
We have found generic Killing spinor identities which bosonic equations of motion have to satisfy in supersymmetric theories if the solutions admit Killing spinors. Those identitie…