Slides of some talks:
Five Worlds: a Mathematical Problem Determines Which One We Live In
(Public lecture, Hunter College CUNY, Dec 2011)
sets in a free group
- Invited Talk at the International Congress of Mathamaticians in Seoul, South Korea 2014
Click here to view slides of the talk.
- Groups acting on Lambda trees. Paris 2014
- Tarski problems for algebras, Oaxaca 2015
See my CV for a full list of lectures.