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Tired of strange British comedy videos and musical numbers which just get stranger and stranger? Wishing for some serious mathematics on this Web of ours? Well, consider your wishes fulfilled:

Be forewarned — Dr. Cheng goes fast, and she mislabels one arrow in the associativity square ([tex]T \mu[/tex] instead of [tex]\mu T[/tex]) before catching herself.

Via The n-Category Café.

2 Comments

  1. Cool.

    Is that a space ship landing and taking off outside?

  2. She mislabeled the associativity square arrow! I would NEVER do something as silly as that… because I haven’t got a clue what an “associativity square” is in the first place, and so tend to avoid drawing arrows anywhere near them.


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