Restriction to Levi subalgebras and generalization of the category $𝒪$

Tomasini, Guillaume

Annales de l'Institut Fourier, Volume 63 (2013) p. 37-88

A generalization of the category O of Bernstein–Gelfand–Gelfand

Tomasini, Guillaume

Comptes Rendus. Mathématique, Volume 348 (2010) p. 509-512