## Archive for August 26th, 2009

### More on twin primes and Pythagorean triples

Posted by: **Dave Richeson** on August 26, 2009

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

Posted by: **Dave Richeson** on August 26, 2009

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

- RT @JointMath: See the talks in the AMS Special Session on Dynamical Systems buff.ly/2eeVdvX #JMM17 2 days ago
- RT @viktorblasjo: @CmonMattTHINK Maybe this basic geometry one. Source: maa.org/sites/default/… https://t.co/WJaIb880iD 2 days ago
- RT @CmonMattTHINK: So besides infinitude of primes & irrationality of sqrt(2), what are your favorite proofs by contradiction? (Advanced HS… 2 days ago
- I love that the missing link bison is called the 'Higgs Bison' n.pr/2ekRKqC 4 days ago
- Not really a fan of most post-1974ish jazz, but just stumbled upon this 2010 song. Wow! Have to check these guys out youtube.com/watch?v=ly8Kni… 5 days ago

- How to curve an exam and assign grades
- What is the difference between a theorem, a lemma, and a corollary?
- Music is math: ten songs about mathematics
- Is or an inclusive or or an exclusive or?
- E-Z Pass, speeding tickets, and the mean value theorem
- LaTeX now available in Google Docs
- Showing two expressions are equal: stop the madness
- Volumes of n-dimensional balls
- Extreme examples and counterexamples
- The geometry of meandering rivers