Motiejus Valiunas

activity

20142026

most citedAcylindrical hyperbolicity of groups acting on quasi-median graphs and equations in graph products

7 citations · 37 across the 19 of their papers we have counts for

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Showing 2026Show all

2 papers · 1 filter

math.LO2026

Invariant means, coset correct means and the Hahn-Banach Theorem

Armando Martino, Motiejus Valiunas

We show that, in ZF set theory, the existence of "coset correct means" on all groups is equivalent to the Hahn-Banach Theorem, as well as to the existence of invariant means on abe…

math.GR2026

Outer automorphisms of HNN extensions of abelian groups

Naomi Andrew, Sam Hughes, Motiejus Valiunas

Let $G$ be a commensurating HNN extension of a finitely generated free abelian group. We characterise when $Out (G)$ is finitely generated and derive structural information…