Simplicity of algebras via epsilon-strong systems
Patrik Nystedt · Colloquium Mathematicum · 2020
We obtain sufficient criteria for simplicity of systems, that is, rings $R$ that are equipped with a family of additive subgroups $R_s$ for $s \in S$, where $S$ is a semigroup satisfying $R = \sum _{s \in S} R_s$ and $R_s R_t \subseteq R_{st}$ for $s,t \i