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.
The meta-bicrossed-product of arrow diagrams and its underlying topology.
The simplest bicrossed product, steps in the construction of a knot.
Proof of the algebraic definition of ribbon knots.