Barbeau was a professor of mine back in the late 1980s, great to hear that he's still around. It was a wonderful class, with Ravi Vakil [1] and Nima Arkani-Hamed [2] in it.

[1] http://en.wikipedia.org/wiki/Ravi_Vakil [2] http://en.wikipedia.org/wiki/Nima_Arkani-Hamed