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Yes, your fun fact is in Baez's TWF week 92 (1996): http://math.ucr.edu/home/baez/week92.html http://math.ucr.edu/home/baez/week92.html and the core propositi
by mikhailfranco 7y ago
Yes, your fun fact is in Baez's TWF week 92 (1996):
http://math.ucr.edu/home/baez/week92.html http://math.ucr.edu/home/baez/week92.html
and the core proposition goes back to Penrose.
- kmill 7y agoI see I was rather oblique, but I brought up the fun fact because that equation is how Penrose proved it (to account for signs). By the way, the TWF article is citing the Bar-Natan paper.