BIRKHOFFS-THEOREM WITH LAMBDA-TERM AND BERTOTTI-KASNER SPACE

If a Lambda-term is included, the usual generalization of Schwarzschil d space is not the only possible spherically symmetric vacuum solution . Another is Bertotti-Kasner space, as has been noted before but not e xplicitly demonstrated. The purpose of this note is to reformulate the unicity theorem and to discuss the extra solution. (C) 1998 Elsevier Science B.V.