COMPLETELY INVARIANT SUBSPACES OF FREE ALGEBRAS N.G. Najaryan
A structural theorem is proved for pMqBM completely invariant subspaces of free associative algebras with a unit, having a countable number of free variables over the field of characteristic zero. In particular, it is shown that such spaces contain a Lie nilpotent polynomial.
DOI: 10.46991/PYSUA.2011.45.1.064 Physical and Mathematical Sciences, 45(1 (224) 64-65