What is david jerison?

As an AI language model, I have limited information on David Jerison. However, based on my research, David Jerison is a professor of mathematics at the Massachusetts Institute of Technology (MIT), where he has been teaching since 1983. He is a specialist in several areas of mathematics, including analysis, differential equations, and geometric analysis. Jerison has won a number of awards and honors for his work, including the Sloan Fellowship, the National Science Foundation Presidential Young Investigator Award, and the Salem Prize. He is also a fellow of the American Mathematical Society.