Groups of cohomological codimension one
Year: 2026
Type: article
Abstract: We show that if H is a commensurated subgroup of G such that both H and G are of type V F P and vcd ( G ) = vcd ( H ) + 1 , then G is the fundamental group of a graph of groups in which all vertex and edge groups are commensurable to H . We also investigate commensurated subgroups of one-relator groups and duality groups.
Source: Annales de l’institut Fourier
DOI: 10.5802/aif.3766
Author: Alexander J. Margolis
Institution: Wesleyan University
Language: English
Subfield: Geometry and Topology
Field: Mathematics
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7140859612