Mikhail Ershov

collaborators

2 papers

math.GR2026

On finite presentability of some partial Torelli subgroups of Aut(F_n)

Mikhail Ershov

Let $F_{n}$ be the free group of rank $n$ , and let $ρ_{ab} : Aut (F_{n}) \to GL_{n} (Z)$ be the map induced by the natural projection $F_{n} \to Z^{n}$ . It is a lo…

math.GR2025

Dense and empty BNSR-invariants of the McCool groups

Mikhail Ershov, Matthew C. B. Zaremsky

An automorphism of the free group $F_{n}$ is called pure symmetric if it sends each generator to a conjugate of itself. The group $PSA_{n}$ of all pure symmetric automorphisms…