Aut(T_{n,r}) is exactly the bi-synchronizing transducer subgroup T B_{n,r} that preserves the cyclic order, and Out(T_{n,r}) contains a copy of Thompson's group F for n ≥ 3.
Twisted conjugacy in Richard Thompson's group T
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abstract
Let $f$ be an automorphism of a group $G$. Two elements $x, y$ in $G$ are said to be in the same $f$-twisted conjugacy class if there exists an element $z$ in $G$ such that $y=z x f(z^{-1})$. This is an equivalence relation known as $f$-twisted conjugacy. If the number $R(f)$ of $f$-twisted conjugacy classes is infinite for every automorphism $f$ of $G$ one says that $G$ has the $R_\infty$-property. We show that the Richard Thompson group $T$ has the $R_\infty$-property.
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math.GR 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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Automorphisms of the generalised Thompson's group $T_{n,r}$
Aut(T_{n,r}) is exactly the bi-synchronizing transducer subgroup T B_{n,r} that preserves the cyclic order, and Out(T_{n,r}) contains a copy of Thompson's group F for n ≥ 3.