Algebras and groups defined by permutation relations of alternating type

Cedo, Ferran; Jespers, Eric; Okninski, Jan

Algebras and groups defined by permutation relations of alternating type

Authors

Cedo, Ferran

Jespers, Eric

Okninski, Jan

Description

The class of finitely presented algebras over a field $K$ with a set of generators $a_{1},..., a_{n}$ and defined by homogeneous relations of the form $a_{1}a_{2}... a_{n} =a_{σ(1)} a_{σ(2)} ... a_{σ(n)}$, where $σ$ runs through $\Alt_{n}$, the alternating group, is considered. The associated group, defined by the same (group) presentation, is described. A description of the radical of the algebra is found. It turns out that the radical is a finitely generated ideal that is nilpotent and it is determined by a congruence on the underlying monoid, defined by the same presentation.