On infinite dimensional Lie algebras having a Cartan decomposition

We introduce the concept of Cartan decomposition relative to a Cartan subalgebra H, in the sense of Y. Billig and A. Pianzola, for Lie algebras of arbitrary dimension. The class of simple Lie algebras having such decomposition is a wide class of Lie algebras closely related to the topologically simple L*-algebras, the simple c-involutive Lie algebras and the topologically simple compact Banach-Lie algebras. We give a description theorem for the complex ones, turning out to be the natural extension of the finite dimensional setup.

Antonio J. Calderón Martín < ajesus.calderon@uca.es >

Manuel Forero Piulestán < ForeroManuel@hotmail.com >