Margulis lemma
= Margulis lemma
{wiki=Margulis_lemma}
The Margulis Lemma is a result in the theory of manifolds and geometric group theory, named after the mathematician Gregory Margulis. It provides important insights into the structure of certain types of groups acting on hyperbolic spaces. The lemma primarily concerns the actions of groups on hyperbolic spaces and focuses on the properties of relatively compact subsets and their orbits under isometries.