Hyperbolicity of Semigroup Algebras

E. Iwaki, S. O. Juriaans, A. C. Souza Filho

Let $A$ be a finite dimensional $Q-$algebra and $\Gamma subsetA$ a $Z-$order. We classify those $A$ with the property that $Z^2$ does not embed in $\mathcal{U}(\Gamma )$. We call this last pr…