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History and philosophy of mathematics, biographies of mathematicians, mathematics education, recreational mathematics, communication of mathematics.

38 votes

What are some deep theorems, and why are they considered deep?

As a very concrete example of a deep theorem different from the ones you've already mentioned, I'd nominate the Atiyah-Singer Index theorem and its more general cousins for consideration in your talk. …
Vidit Nanda's user avatar
  • 15.5k
15 votes
Accepted

Discrete Morse theory and chess

The quick answer to your question is no, discrete Morse theory has not been used to study chess moves yet (unless this has been done in some very obscure journal). I would like to highlight a few like …
Vidit Nanda's user avatar
  • 15.5k
17 votes
1 answer
1k views

Raoul Bott's quote on Morse Theory cited by Bestvina and Kahle: where is it from?

I wanted to properly cite the following awesome quote: Every mathematician has a secret weapon. Mine is Morse theory. - Raoul Bott Now this has been attributed to Bott in precisely two places th …
7 votes
Accepted

Raoul Bott's quote on Morse Theory cited by Bestvina and Kahle: where is it from?

Here is Mladen's response to my email asking this question: I heard him say it in a colloquium talk in 2001 (I think). Case closed, unless Bob MacPherson has a different answer.
Vidit Nanda's user avatar
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22 votes
0 answers
3k views

Origins of the Nerve Theorem

Recently, I've read two papers which have cited the Nerve Theorem, one crediting Borsuk with the result and another Leray. Here is the question: Who was the first to prove the Nerve Theorem?