Describtion of normal basis of boundary algebras and factor languages of small growth

A. Ya. Belov, A. L. Chernyatiev

Let $A$ be an algebra with fixed set of generators $a_1,\dots ,a_s$. $V_A(n)$ be dimension of the space, generated by worlds of length $\le n$ over $a_i$, $T_A(n)=V_A(n)-V_A(n-1)$.…