(1) Department of Mathematics, Stanford University, 94305-2125 Stanford, CA, USA;(2) Department of Mathematics, Stanford University, Bldg. 380, 94305-2125 Stanford, CA, USA
Abstract:
This column is a place for those bits of contagious mathematics that travel from person to person in the community, because they are so elegant, suprising, or appealing that one has an urge to pass them on. Contributions are most welcome.