Word Problems in Russia and America

A talk at the meeting of the Swedish
Mathematical Society. Göteborg. June, 2005

School Math in USA and Russia

A talk at the conference “Does Counting Help
you Thing?” at the University of Lisbon,
Portugal. November, 2010

All Local Operators are
Continuous and Fine

Presented on the 13th Brazilian School of
Probability in August, 2009.

Cellular Spaces

Mini-course organized and supported by
Estonian Doctoral School of Mathematics and
Statistics. Was delivered in University of
Tartu, Estonia. 14-18 January, 2013.