An incoherent simple group
Abstract
We give an example of a finitely presented simple group containing a finitely generated subgroup which is not finitely presented.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.