|THOMAS S. SALISBURY, Department of Mathematics and Statistics, York University, Toronto, Ontario M3J 1P3, Canada|
|The complement of the planar Brownian path|
Take a planar Brownian path, run until it exits the unit ball. The complement of the path consists of many components, and we can ask about their general shape. The talk will describe joint work with Yuval Peres, in which we show that the components are round, in the sense that their areas are comparable to the square of their diameters. More formally, we show that for every , if and only if , where Ai is the area of the i-th component, and Ri is its diameter.