2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/70098Let M be a positive quaternionic Kaehler manifold of dimension 4m. If the isometry group Isom(M) has rank at least m/2 +3, then M is isometric to HP^m or Gr_2(C^{m+2}). The lower bound for the rank is optimal if m is even.10 pagesDifferential GeometryGeometric Topologytext