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Posted on Tuesday, 12 June 2012

  • Why bicontinuity is the right condition for topological equivalence (homeomorphism): if continuity of the inverse isn’t required, then a circle could be equivalent to a line (.99999 and 0 would be neighbours) — Minute 8 or so.
  • Geometric construction (no complex numbers) of the circle group.
  • Pappos’ theorem. (Minute 31)
  • Pascal’s theorem.
  • Desargues’ theorem.
Hat tip to +Ozymandias Haynes.

22 notes

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    Yes, I’ve been watching this. No, I don’t understand most...it Let me know if you...
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    Ah, the scratching of chalk…
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