Geodesic
The Inner Ideals of the Simple Finite Dimensional Lie Algebras
Cristina Draper1 ; Antonio Fernández López1 ; Esther García2 ; Miguel A. Goméz Lozano3
1Dep. de Matemática Aplicada, Universidad de Málaga, 29071 Málaga, Spain
2Dep. de Matemática Aplicada, Universidad Rey Juan Carlos, 28933 Móstoles -- Madrid, Spain
3Dep. Álgebra, Geometría y Topología, Universidad de Málaga, 29071 Málaga, Spain
Journal of Lie Theory, Tome 22 (2012) no. 4, pp. 907-929

Voir la notice de l'article provenant de la source Heldermann Verlag

The inner ideals of the simple finite dimensional Lie algebras over an algebraically closed field of characteristic 0 are classified up to conjugation by automorphisms of the Lie algebra, and up to Jordan isomorphisms of their corresponding subquotients (any proper inner ideal of such an algebra is abelian and therefore it has a subquotient which is a simple Jordan pair). While the description of the inner ideals of the Lie algebras of types Al, Bl, Cl and Dl can be obtained from the Lie inner ideal structure of the simple Artinian rings and simple Artinian rings with involution, the description of the inner ideals of the exceptional Lie algebras (types G2, F4, E6, E7 and E8) remained open. The method we use here to classify inner ideals is based on the relationship between abelian inner ideals and Z-gradings, obtained in a recent paper of the last three named authors with E. Neher ["A construction of gradings of Lie algebras", Int. Math. Res. Not. IMRN 16, Art. ID mm051, 34 (2007)]. This reduces the question to deal with root systems.
Classification : 17B30
Mots-clés : Lie algebra, Jordan pairs, inner ideal, subquotient, grading

Cristina Draper  1   ; Antonio Fernández López  1   ; Esther García  2   ; Miguel A. Goméz Lozano  3

1 Dep. de Matemática Aplicada, Universidad de Málaga, 29071 Málaga, Spain
2 Dep. de Matemática Aplicada, Universidad Rey Juan Carlos, 28933 Móstoles -- Madrid, Spain
3 Dep. Álgebra, Geometría y Topología, Universidad de Málaga, 29071 Málaga, Spain 
Cristina Draper; Antonio Fernández López; Esther García; Miguel A. Goméz Lozano. The Inner Ideals of the Simple Finite Dimensional Lie Algebras. Journal of Lie Theory, Tome 22 (2012) no. 4, pp. 907-929. http://geodesic.mathdoc.fr/item/JOLT_2012_22_4_a0/
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