Blackboard Shots with Prefix "Kazhdan"

191231-140530: 1+1=2.

191231-140529: DoPeGDO (2).

191231-140528: Knots and virtual knots, $\theta$.

191231-140527: DoPeGDO.

110406-131635: A Sketch (2).

110405-102541: A Sketch.

080717-155154: Dreams on Quantum Groups.