Langlands decomposition
In mathematics, the Langlands decomposition writes a parabolic subgroup P of a semisimple Lie group as a product of a reductive subgroup M, an abelian subgroup A, and a nilpotent subgroup N.
In mathematics, the Langlands decomposition writes a parabolic subgroup P of a semisimple Lie group as a product 
of a reductive subgroup M, an abelian subgroup A, and a nilpotent subgroup N.