© | Dror Bar-Natan: Academic Pensieve: Blackboard Shots: Random

Blackboard Shots with Prefix "KhesinA"


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.