© | Dror Bar-Natan: Odds and Ends: Videos for Swiss Knots 2011:

Wehrli's Talk

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Videography by Pierre Dehornoy

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Managed by dbnvp: Tip: blackboard shots are taken when the discussion of their content has just ended. To see the beginning of the discussion on a certain blackboard, roll the video to the time of the preceeding blackboard.