Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-06-01
J.Phys.A40:5355-5372,2007
Physics
High Energy Physics
High Energy Physics - Theory
21 pages. 2 Tables, 2 figures
Scientific paper
10.1088/1751-8113/40/20/008
The problem of non-solvable contractions of Lie algebras is analyzed. By means of a stability theorem, the problem is shown to be deeply related to the embeddings among semisimple Lie algebras and the resulting branching rules for representations. With this procedure, we determine all deformations of indecomposable Lie algebras having a nontrivial Levi decomposition onto semisimple Lie algebras of dimension $n\leq 8$, and obtain the non-solvable contractions of the latter class of algebras.
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