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

Authors
  • Belov, A. Ya.
  • Chernyatiev, A. L.
Type
Preprint
Publication Date
Feb 10, 2016
Submission Date
Feb 10, 2016
Identifiers
arXiv ID: 1602.03510
Source
arXiv
License
Yellow
External links

Abstract

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 $a_i$, $T_A(n)=V_A(n)-V_A(n-1)$. If $T_A(n)<\mbox{Const}$, algebra $A$ is a {\it boundary algebra}. We describe a normal basis of boundary algebras, i.e. algebras with small growth. Let $\cal L$ be a factor language over alphabet $\cal A$. {\it Growth function} $T_{\cal L}(n)$ is number of subwords $\cal L$ of degree $n$. We describe factor languages of small growth such that $T_{\cal L}(n)\le n+\mbox{const}$.

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