Abstract: | The goal of the paper is to prove that the canonical seminorm on the second bounded cohomology group is always a norm. The corresponding question remains open in the higher dimensional cases.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 167, pp. 117–120, 1988. |