2 papers
math.RT2026
Ringel's contributions to quasi-hereditary algebras
Changchang Xi
Quasi-hereditary algebras were introduced by Cline, Parshall and Scott to describe the highest weight categories of representations of semisimple Lie algebras and algebraic groups…
math.CO2024
Structure of Terwilliger algebras of quasi-thin association schemes
Zhenxian Chen, Changchang Xi
We show that the Terwilliger algebra of a quasi-thin association scheme over a field is always a quasi-hereditary cellular algebra in the sense of Cline-Parshall-Scott and of Graha…