On analytic continuation from the "edge of the wedge"

The "edge or the wedge" theorem was first proved by N. N. Bogoliubov in 1956 in connection wilh applications to quantum field theory (see [7]). During the next years many various proofs, generalizalions and refinements of Bogoliubov's theorem were obtained; the problems and results concerning this theorem consti- tuted an important chapter in the theory of analytic functions of several complex variables and its applications (see [-9]; an extensive bibliography can be found in V. S. Vladimirov's recent survey [9]).