摘要
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.
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.
基金
supported by National Natural Science Foundation of China (Grant No. 10626031)
Natural Science Foundation of Shandong Province (Grant No. Y2006A03)
the Scientific Research Project of the Department of Education of Shandong Province (Grant No. J08LI15)
