A “residually finite group” is group for which the intersection of all finite index subgroups is trivial. Suppose $ G$ and $ G’$ are two quasi-isometric finitely generated groups. Does the residual finiteness of $ G$ implies the same property for $ G’$ ?
I tried to find out a path to learn Quasi Crystam Mathematics? My math knowledge is only pretty basic however I am very much willing to work the way through up even undergrad parts and above if I can learn it through books or online.
What would it take to understand, use and work with Quasi Crystal Mathematics.