Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Peter David Lax (born 1 May 1926) is a mathematician working in the areas of pure and applied mathematics. He has made important contributions to integrable systems, fluid dynamics and shock waves, solitonic physics, hyperbolic conservation laws, and mathematical and scientific computing, among other fields. Lax is listed as an ISI highly cited researcher.Lax was born in Budapest, Hungary in Jewish family, and moved with his parents (Klara Kornfield and Henry Lax, both were medical doctors) to New York City in 1941, where he studied at Stuyvesant High School. In 1948 he married Anneli Cahn, who also was on her way to becoming a career mathematician.