Oliver Club

Tullia DymarzUniversity of Wisconsin, Madison
Two coarse geometries for groups

Thursday, October 23, 2014 - 4:00pm
Malott 532

Finitely generated groups can be made into metric spaces via word metrics. Since word metrics depend on a choice of generating set, the geometry of a group can only be defined up to an equivalence. The two natural choices of equivalences one can use are bilipschitz or quasi-isometric equivalence. We answer the basic question of whether these two equivalences are the same by providing families of counterexamples where they are not.

Refreshments will be served at 3:30 PM.