EntityQ2976517· pop 5· linked from 128 articlesADE classificationSign in to saveMathematical classificationConnectionsDynkin diagramEntitydiffeomorphismEntityCoxeter groupEntityroot systemEntityprojective linear groupEntityblock designEntitysymplectomorphismEntityMcKay graphEntitymathematicsEntityInternational Standard Book NumberEntityHoly TrinityEntitycubeEntitydigital object identifierEntityInternational Standard Serial NumberEntityÉvariste GaloisEntitytetrahedronEntityFelix KleinEntityJSTOREntityVladimir ArnoldEntityPlatonic solidEntityCategoriesLie groups