Mathematics – Rings and Algebras
Scientific paper
2008-05-06
Groups, Geometry and Dynamics 4 (2010), 15-29
Mathematics
Rings and Algebras
Scientific paper
We prove that for every automata algebra of exponential growth, the associated Lie algebra contains a free subalgebra. For n\geq 1, let L_{n+2} be a Lie algebra with generator set x_1,..., x_{n+2} and the following relations: for k\leq n, any commutator of length $k$ which consists of fewer than k different symbols from {x_1,...,x_{n+2}} is zero. As an application of this result about automata algebras, we prove that for every n\geq 1, L_{n+2} contains a free subalgebra. We also prove the similar result about groups defined by commutator relations.
Belov Alexey
Mikhailov Roman
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