Ringel–Hall algebra
= Ringel–Hall algebra
{wiki=Ringel–Hall_algebra}
The Ringel-Hall algebra is a mathematical structure that arises in the study of representation theory, particularly in the context of finite-dimensional algebras and their associated categories. It was introduced by C. M. Ringel and is primarily used to provide a framework for understanding and working with the representations of quivers (directed graphs) and related categories.