On tame weakly symmetric algebras having only periodic modules
Tóm tắt
We classify (up to Morita equivalence) all tame weakly symmetric finite
dimensional algebras over an algebraically closed field having simply connected
Galois coverings, nonsingular Cartan matrices and the stable Auslander-Reiten
quivers consisting only of tubes. In particular, we prove that these algebras
have at most four simple modules.