## Mathematical posts

- The "What Is...?" column
- How big are families with the same number of girls and boys?
- Reading mathematical papers on the Nook
- Computer proved monotonicity of some coefficients
- Apollonian circle packings in Mathematica
- Fast q-binomials in Mathematica
- Tulane math department picture 2009
- A trick for playing a multivariate integral
- Hiring a secretary
- Square roots of minus one in modular arithmetic