A blog about math, puzzles, teaching, and academic technology

Euler's Gem: The polyhedron formula and the birth of topology

Princeton University Press

2008

Euler's Gem Facebook page

Buy it:

Princeton University Press

Amazon

Princeton University Press

2008

Euler's Gem Facebook page

Buy it:

Princeton University Press

Amazon

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- Wired magazine uses Euler's Bridges of Königsberg problem as a way to introduce Google's Trips app. bit.ly/2cXnd4l 4 days ago
- Fun fact: one pound of dimes, quarters and half-dollars, in any combination is $20. bit.ly/2cXd5sm 4 days ago
- Nice surprise to be invited back to my alma mater @HamiltonCollege to give a talk—as part of retirement celeb for two of my undergrad profs. 4 days ago

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- Sugihara's Circle/Square Optical Illusion
- LaTeX now available in Google Docs
- More on twin primes and Pythagorean triples
- Make a Sugihara Circle/Square Optical Illusion Out of Paper
- Playing the probabilities in Settlers of Catan
- E-Z Pass, speeding tickets, and the mean value theorem

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