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00925njm 22002777a 4500 dc Emparan García de Salazar, Roberto A. author 2010-05-06T09:25:48Z 2010-05-06T09:25:48Z 2000 We present and analyze exact solutions of the Einstein-Maxwell and Einstein-Maxwell-dilaton equations that describe static pairs of oppositely charged extremal black holes, i.e., black diholes. The holes are suspended in equilibrium in an external magnetic field, or held apart by cosmic strings. We comment as well on the relation of these solutions to brane-antibrane configurations in string and M theory. Relativitat (Física) Forats negres (Astronomia) Gravitació Relativity (Physics) Black holes (Astronomy) Gravitation Black diholes