Koszul pairs and applications

Pascual Jara Martínez, Javier López Peña, Dragoş Ştefan

Let $R$ be a semisimple ring. A pair $(A,C)$ is called almost-Koszul if $A$ is a connected graded $R$-ring and $C$ is a compatible connected graded $R$-coring. To an almost-Koszul…