Matrix entries, unipotents, and linearity of amalgams
arXiv:2603.23969
Abstract
We investigate linearity of amalgams of subgroups of algebraic groups along intersections with algebraic subgroups. In the process, we establish linearity of certain "doubles" of linear groups, and obtain new examples of finitely generated residually finite groups that fail to be linear.
18 pages. Minor edits; Changqian Li has since posted a response arXiv:2605.21734 to a question raised in the previous version