Event Detail

Event Type: 
Department Colloquium
Date/Time: 
Friday, April 23, 2010 - 09:00

Speaker Info

Institution: 
Reed College
Abstract: 

The discrete Laplacian associates a group, called the sandpile group, to any finite connected graph. Matthew Baker et al. have shown how this group is (more than) analogous to the Picard group of an algebraic curve. On the other hand, the theory of lattice ideals relates the sandpile group to the algebraic geometry of a certain finite point set, leading to new invariants for graphs. The talk will give an introduction to these ideas.