It's like Good Will Hunting, Russian style! Grigory Perelman, a 43-year-old unemployed genius, solved a century-old math problem and is in line for a big payday, but so far he's saying "nyet" to the prize money.

Over at the Times' wholly owned Magazine subsidiary, T expansionism continues unabated this weekend with an issue entirely dedicated to...food. Or is it? To wit, Alexandra Jacobs has a column regarding the difficulties of going Dutch at birthday parties, but a little induction reveals the article as less about the epicurean lifestyle, than, say, winning a Fields Medal. It's called "You Do the Math." Don't mind if we do.