QUANTUM CORRECTIONS FOR D=4 BLACK-HOLES AND D=5 STRINGS

In recent times quantum corrections for N = 2 black holes in 4 dimensi ons have been addressed in the framework of double extreme black hole solutions, which are characterised by constant scalar fields. In this paper we generalize these solutions to non-constant scalar fields. Thi s enables us to discuss quantum corrections for massless black holes a nd for configurations that are classically singular. We also discuss t he relation to the 5-dimensional magnetic string solution. (C) 1997 El sevier Science B.V.