# The Math behind Against the Day (Part 1): How to win at roulette

Yashmeen Halfcourt is a mathematician and one of the major characters in Pynchon’s book “Against the Day”. And she seems to have figured out a way to beat the odds in roulette using prime numbers? But then wheels all up and down the Riviera, at Nice, Cimiez, Monte Carlo, Mentone, through the winter season and…