Previous Conferences & Workshops

A hiker holding an analog altimeter (with a needle indicating altitude modulo a constant $\chi$) in one hand and a compass in the other traces an {\em altimeter-compass ray (ACR)} by walking in such a way that the altimeter and compass needles are...

We will discuss results connecting the titular objects on infinite graphs, including some known results by Varopoulos and Coulhon and Saloff-Coste and some new resutls.

A classical theorem of Edmonds provides a min-max formula relating the maximal size of a set in the intersection of two matroids to a ``covering" parameter. In this talk we generalize this theorem, replacing one of the matroids by a general...