The 52nd Carnival of Mathematics is underway over at The Number Warrior. I’m glad it was resurrected. Check it out!

Two other mathematical tidbits.

Clue in yesterday’s NY Times crossword: Calculus pioneer.

The answer: EULER.

Also in today’s NY Times, the headline: U.S. Jobless Rate Hits 8.9%, but Pace of Losses Eases. When I first saw this I thought **third derivative**! The rate of change of a rate is decreasing. However, upon further reflection, I realized that the unemployment rate is not really a rate of change in the calclulus sense—and is definitely not a time derivative—so the statement is only a second derivative. Oh, well.

(Contrast this with Richard Nixon’s use of the third derivative).