EntityQ4944913· pop 5· linked from 87 articlesBorel subgroupSign in to savemaximal Zariski-closed connected solvable algebraic subgroup of an algebraic groupConnectionsalgebraic groupEntityorthogonal groupEntityphysicsEntityInternational Standard Book NumberEntityHenri PoincaréEntitydigital object identifierEntityHermann WeylEntityCambridge University PressEntitySophus LieEntityÉlie CartanEntityLie groupEntitytriangular matrixEntityLie algebraEntityJacques TitsEntityrepresentation theoryEntityorder theoryEntityHarish-ChandraEntityPoincaré groupEntityWilhelm KillingEntityEncyclopedia of MathematicsEntityCategoriesAlgebraic groups