%0 Journal Article %A Forrest Glebe %T A constructive proof that many groups with non-torsion $2$-cohomology are not matricially stable %J Groups, geometry, and dynamics %D 2025 %P 195-226 %V 19 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4171/ggd/793/ %R 10.4171/ggd/793 %F 10_4171_ggd_793