Mathematical Biology Work in mathematical biology includes both deterministic and stochastic models. Ordinary and partial differential equations are used to model deterministic biological systems. Recent work in this area has focused on modified ordinary differential equations that model such phenomena as the return to the interior of a domain by animals that reach the boundary--for example, the transport to wilderness areas of bears that approach populated areas. Stochastic models of interest include population genetics and spatial models in ecology. See the "Probability" section below. We are fortunate to have very strong research groups in various biology departments on campus. There is a good deal of interaction between the departments. In addition, nearby Washington State University has a number of people interested in mathematical biology.