On automorphisms of the semigroup $\boldsymbol{B}_ω^{\mathscr{F}}$ in the case when the family $\mathscr{F}$ consists of nonempty inductive subsets of $ω$

Abstract

Let $\mathscr{F}$ be a family of nonempty inductive subsets of $ω$. It is proved that an injective endomorphism $\varepsilon$ of the semigroup $\boldsymbol{B}_ω^{\mathscr{F}}$ is the transformation if and only if $\varepsilon$ has three distinct fixed points, which is equivalent to existence non-idempotent element $(i,j,[p))\in\boldsymbol{B}_ω^{\mathscr{F}}$ such that $(i,j,[p))\varepsilon=(i,j,[p))$.