Leibniz cohomology in low degreessome structure theory of Leibniz n-algebras

  1. TURDIBAEV, RUSTAM
Dirixida por:
  1. Bakhrom A. Omirov Director
  2. Manuel Ladra González Director

Universidade de defensa: Universidade de Santiago de Compostela

Fecha de defensa: 22 de decembro de 2015

Tribunal:
  1. Eduardo García Río Presidente
  2. Ana Jeremías López Secretaria
  3. José Manuel Casas Mirás Vogal
  4. Luisa María Camacho Santana Vogal
  5. Cristina Costoya Vogal

Tipo: Tese

Resumo

In this thesis some tools to study cohomology groups of Leibniz algebras with values in itself are presented. Using Levi decomposition for semisimple Leibniz algebras we establish more precise decomposition of their cohomology groups. Close look to cohomologies in low degrees yields results on outer derivations of semisimple Leibniz algebra. Furthermore, an analogue of Jordan-Chevalley decomposition for Leibniz algebras is established. Moving to a more general object, Leibniz n-algebra a several notions of solvability and nilpotence are introduced and their invariance under derivations is established. The Frattini and Cartan subalgebras of Leibniz n-algebras are studied. Some classical results on these subalgebras are extended to Leibniz n-algebras, while some do not. In particular, examples showing that a statement on conjugacy of Cartan subalgebras of Lie algebras, which also holds in Leibniz and n-Lie algebras, does not hold for Leibniz n-algebras are constructed.