Russian Симметрическое пространство Cited by user Tosha on 16 Apr 2016 Симметрическое пространство — риманово многообразие, группа изометрий которого содержит центральные симметрии с центром в любой точке.
English Freudenthal magic square Cited by user Nbarth on 24 Nov 2012 In mathematics, the Freudenthal magic square (or Freudenthal–Tits magic square) is a construction relating several Lie algebras (and their associated Lie groups).
English Symmetric space Cited by user Nbarth on 24 Nov 2012 In differential geometry, representation theory and harmonic analysis, a symmetric space is a smooth manifold whose group of symmetries contains an inversion symmetry…