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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- Make a Sugihara Circle/Square Optical Illusion Out of Paper
- Sugihara's Circle/Square Optical Illusion
- Tricks for easily creating BibTeX files
- Is or an inclusive or or an exclusive or?
- LaTeX now available in Google Docs
- Topological maps or topographic maps?
- E-Z Pass, speeding tickets, and the mean value theorem

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