© | Dror Bar-Natan: Academic Pensieve: Blackboard Shots: KhesinA:
170220-155647: Ribbons, fundamental groups.
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KhesinA-{ hide text
  180226-150056: The limsup riddle.
  170220-155647: Ribbons, fundamental groups.
  160729-190625: Quandles.
  160623-152925: Detecting 2-passes.
  160620-153411: 2-pass, 3-2 pass, planarity.
  160524-154218: Planarity.
  160516-161712: Enumeration strategies.
  160511-162028: The Wirtenger presentation.
  160504-164650: DT notation.
  160212-145022: $\pi$ is irrational.
  160205-141905: A tangle description of ribbon knots (3).
  160205-140942: A tangle description of ribbon knots (2).
  160205-133743: A tangle description of ribbon knots.
  151204-130626: Alexander and Jones for tangles.
  151120-134446: Symmetric unions and 4-tangles (2).
  151120-131421: Symmetric unions and 4-tangles.
  151113-134045: Ribbon knots from a parameter-space perspective.
  151106-121309: $\Delta$ and $\Delta\Delta$.
  151030-134508: Some savings.
  151030-130913: Unusual things in high D.
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