๐-categories and ๐-functors in the representation theory of Lie algebras
๐-categories and ๐-functors in the representation theory of Lie algebras
The fields of algebra and representation theory contain abundant examples of functors on categories of modules over a ring. These include of course Horn, Ext, and Tor as well as the more specialized examples of completion and localization used in the setting of representation theory of a semisimple Lie algebra. โฆ