2 citations · 6 across the 14 of their papers we have counts for
9 papers · 1 filter
Baumslag-Solitar groups and residual nilpotence
C. E. Kofinas, V. Metaftsis, A. I. Papistas
For a Baumslag-Solitar group we calculate the intersection of all terms of the lower central sequence of .Using this we are able to show that th…
Quotient groups of IA-automorphisms of a free group of rank 3
V. Metaftsis, A. I. Papistas, H. Sevaslidou
We prove that, for any positive integer , the quotient group of the lower central series of the McCool group is isomorphic to two copies of…
On the quasiconvexity of the fixed subgroup of endomorphisms of relatively hyperbolic groups
V. Metaftsis, M. Sykiotis
We prove that for any finitely generated relatively hyperbolic group G and any symmetric endomorphism f of G with relatively quasiconvex image, Fixf is relatively quasiconvex subgr…
Rank of mapping tori and companion matrices
Gilbert Levitt, Vassilis Metaftsis
Given in , it is decidable whether its mapping torus (the semi-direct product of with ) may be generated by two elements or not; if so, one can classify gener…
On the linearity of the holomorph group of a free group on two generators
F. R. Cohen, V. Metaftsis, S. Prassidis
Let F_n denote the free group generated by n letters. The purpose of this article is to show that Hol(F_2), the holomorph of the free group on two generators, is linear. Consequent…
Relatively free nilpotent torsion-free groups and their Lie algebras
C. Kofinas, V. Metaftsis, A. I. Papistas
For a torsion free finitely generated nilpotent group G we naturally associate four finite dimensional nilpotent Lie algebras over a field of characteristic zero. We show that if G…
On the linearity of HNN-extensions with abelian base group
V. Metaftsis, E. Raptis, D. Varsos
We show that an HNN-extension with finitely generated abelian base group is Z-linear if and only if it is residually finite.
On the residual finiteness of outer automorphisms of relatively hyperbolic groups
V. Metaftsis, M. Sykiotis
We show that every virtually torsion-free subgroup of the outer automorphism group of a conjugacy separable relatively hyperbolic group is residually finite. As a direct consequenc…
On the profinite topology of right-angled Artin groups
V. Metaftsis, E. Raptis
We give necessary and sufficient conditions on the graph of a right-angled Artin group that determine whether the group is subgroup separable or not. Moreover, we investigate the p…