EntityQ5051842· pop 6· linked from 6 articlescategory OSign in to savemathematical termConnectionsroot systemEntityweightEntityInternational Standard Book NumberEntitycomplex numberEntitymoduleEntitycategoryEntityrepresentation theoryEntityabelian categoryEntitysemisimple Lie algebraEntitycenterEntityuniversal enveloping algebraEntityprojective objectEntityinjective objectEntityLie algebra representationEntityCartan subalgebraEntityNoetherian moduleEntityJames E. HumphreysEntitynilpotent Lie algebraEntityCategoriesRepresentation theory of Lie algebras