Moral transgressions, as identified by trigonometry teachers.
A mathematical riddle.
A lost passage from Lewis Carroll.
Fifteen very good books.
Speed required. Nondifferentiability subject to fine.
The ancient battle of "weird" vs. "weird, but not wrong."
And other math cartoons.
A few cheery thoughts.
Snobbery without the snobbery.
A lesson from a mindless game.