Daniel Tătaru

Daniel Ioan Tătaru (born 6 May 1967) is a Romanian mathematician at University of California, Berkeley.

He was born in Piatra Neamț. As a student at the Petru Rareș High School, he won the National Mathematical Olympiad three times and the International Mathematical Olympiad twice. He then studied mathematics at the University of Iași. His 1990 diploma thesis, supervised by Viorel P. Barbu, was on Hamilton–Jacobi equations in Banach spaces and nonlinear semigroups; it won the Gheorghe Țițeica Prize from the Romanian Academy of Sciences. The next year he joined the faculty at Northwestern University and in 2001 he moved to Berkeley. on partial differential equations. In 2003, he was awarded the Romanian Order of Merit, Commander rank. In 2012 he became a fellow of the American Mathematical Society. In 2013 he was selected as a Simons Investigator in mathematics. In 2023, he was elected honorary member of the Romanian Academy.