Daniel Ioan Tătaru (born 6 May 1967) is a

Romania Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, mathematical structure, structure, space, Mathematica ...

University of California, Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a Public university, public Land-grant university, land-grant research university in Berkeley, California, United States. Founded in 1868 and named after t ...

. He was born in

Piatra Neamț Piatra Neamț (; ; ) is the capital city of Neamț County, in the historical region of Western Moldavia, in northeastern Romania. Because of its very privileged location in the Divisions of the Carpathians, Eastern Carpathian mountains, it is con ...

. As a student at the Petru Rareș High School, he won the National Mathematical Olympiad three times and the

International Mathematical Olympiad The International Mathematical Olympiad (IMO) is a mathematical olympiad for pre-university students, and is the oldest of the International Science Olympiads. It is widely regarded as the most prestigious mathematical competition in the wor ...

twice. He then studied mathematics at the

University of Iași The Alexandru Ioan Cuza University (; acronym: UAIC) is a public university located in , Romania. Founded by an 1860 decree of Prince Alexandru Ioan Cuza, under whom the former was converted to a university, the University of , as it was named ...

. His 1990 diploma thesis, supervised by Viorel P. Barbu, was on

Hamilton–Jacobi equation In physics, the Hamilton–Jacobi equation, named after William Rowan Hamilton and Carl Gustav Jacob Jacobi, is an alternative formulation of classical mechanics, equivalent to other formulations such as Newton's laws of motion, Lagrangian mecha ...

s in

Banach space In mathematics, more specifically in functional analysis, a Banach space (, ) is a complete normed vector space. Thus, a Banach space is a vector space with a metric that allows the computation of vector length and distance between vectors and ...

s and nonlinear semigroups; it won the Gheorghe Țițeica Prize from the Romanian Academy of Sciences. Tătaru earned his doctorate from the

University of Virginia The University of Virginia (UVA) is a Public university#United States, public research university in Charlottesville, Virginia, United States. It was founded in 1819 by Thomas Jefferson and contains his The Lawn, Academical Village, a World H ...

in 1992, under supervision of

Irena Lasiecka Irena Lasiecka (; born February 4, 1948) is a Polish-American mathematician, a Distinguished University Professor of mathematics and chair of the mathematics department at the University of Memphis. She is also co-editor-in-chief of two academic ...

. The next year he joined the faculty at

Northwestern University Northwestern University (NU) is a Private university, private research university in Evanston, Illinois, United States. Established in 1851 to serve the historic Northwest Territory, it is the oldest University charter, chartered university in ...

and in 2001 he moved to Berkeley. He won the 2002

Bôcher Memorial Prize The Bôcher Memorial Prize was founded by the American Mathematical Society in 1923 in memory of Maxime Bôcher with an initial endowment of $1,450 (contributed by members of that society). It is awarded every three years (formerly every five yea ...

for his research on

partial differential equation In mathematics, a partial differential equation (PDE) is an equation which involves a multivariable function and one or more of its partial derivatives. The function is often thought of as an "unknown" that solves the equation, similar to ho ...

s. In 2003, he was awarded the Romanian Order of Merit, Commander rank. In 2012 he became a fellow of the

American Mathematical Society The American Mathematical Society (AMS) is an association of professional mathematicians dedicated to the interests of mathematical research and scholarship, and serves the national and international community through its publications, meetings, ...

. In 2013 he was selected as a

Simons Investigator The Simons Foundation is an American private foundation established in 1994 by Marilyn and James Harris Simons, Jim Simons with offices in New York City. As one of the largest charitable organizations in the United States with assets of over $5 ...

Simons Investigator
www.simonsfoundation.org in mathematics. In 2023, he was elected honorary member of the

Romanian Academy The Romanian Academy ( ) is a cultural forum founded in Bucharest, Romania, in 1866. It covers the scientific, artistic and literary domains. The academy has 181 active members who are elected for life. According to its bylaws, the academy's ma ...

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* * 1967 births Living people People from Piatra Neamț 20th-century Romanian mathematicians 21st-century Romanian mathematicians University of California, Berkeley faculty Alexandru Ioan Cuza University alumni University of Virginia alumni International Mathematical Olympiad participants Simons Investigator Partial differential equation theorists Romanian emigrants to the United States Recipients of the National Order of Merit (Romania) Fellows of the American Mathematical Society Honorary members of the Romanian Academy Northwestern University faculty {{Romania-scientist-stub