The tweet that raced around the internet before truth had time to put on its shoes was this: In a delicatessen in Pittsburgh, a mysterious sign had appeared adjuring customers to "Please Refrain From ...

From the author of "The Pentagram Integrals for Inscribed Polygons" and "Spherical CR Geometry and Dehn Surgery" comes "You Can Count on Monsters," a colorful picture book featuring 100 math-themed ...