- Summer 2007 @ Free University of Berlin, with Aaron Dall
-
(Summer 2008 @ University of Utah) The right-hand picture was made with the evolutionary polygon approximation software that I found
here.
- Mar. 22, 2011 @ Newton, Massachusetts, USA (Peet's coffee), with David Buchsbaum and Jerzy Weyman
- Feb. 24, 2012 @ Otaru, Hokkaido, Japan
- Mar. 4, 2012 @ Paris, France
- Mar. 13, 2012 @ Luminy, France
- May 6, 2012 @ Cambridge, Massachusetts, USA (Henrietta's table), with Alejandro Morales, Joel Lewis, Ira Gessel, Richard Stanley, Andrew Gainer, and Alexander Postnikov
- Aug. 15, 2012 @ Lake Louise, Alberta, Canada