Peter D. Lax (1926–2025)

Peter D. Lax has passed away recently. His important contributions to partial differential equations, computational mathematics, and connection to science have benefitted us over the past decades. Several well-known mathematical terms are named after him, including the Lax Admissibility Condition for hyperbolic conservation laws, Lax Pairs for completely integrable systems, Lax Equivalence Theorem for numerical schemes, and Lax–Milgram Theorem in functional analysis. Peter’s unique sense of beauty and his philosophy of the universality of mathematics will continue to fascinate us. He is a member of the National Academy of Sciences, was awarded the National Medal of Science in 1986, the Wolf Prize in 1987, and the Abel Prize in 2005.