Pi day (3.14etc) was celebrated by mathophiles around the world earlier this week. Above, Stanford hottie Lauren Elizabeth O'Neal throws down the intergalactic math posse sign. She's wearing a "Cherry Pi" t-shirt designed by dieselsweeties creator R. Stevens.

"My dorm room number is 314, so I really couldn't resist," she explained. "Plus I decided it would be prudent to invent a pi gang symbol."

Previously on BoingBoing: