WEI ChangGuo 1,& WANG LiGuang 2 1 School of Mathematical Sciences,Ocean University of China,Qingdao 266100,China,2 School of Mathematical Sciences,Qufu Normal University,Qufu 273165
Abstract:
In this paper we give a certain classification theorem of extensions of the torus algebra up to isomorphism and also show that the K 0 -group K 0 (E) and the semigroup V (E) are two complete invariants of such extension algebras.