When I first meet him, he's a bit preoccupied with the fact that his water heater is acting up. He's developed his own web site , which is user-friendly and attractively designed. He follows politics. And his work, though highly theoretical, relates directly to the richness and unpredictability of the world around us. Mohammed's specialization is stochastic analysis, the mathematical study of the dynamics of random variables.
Stochastic analysis is concerned with random change over time, or random evolution.
It is an extension of basic calculus into the area of probability theory. The act of the coin toss involves a random variable, but not random evolution. You've bought into a dynamical system, but one in which you can quantify where you're going to end up. This time you've taken the plunge into a stochastic system, whose fluctuations depend on an untold number of factors, including random effects over time. None, except the certainty of change.