Ludwig Dmitrievich Faddeev, Russian theoretical mathematician and physicist. Achievements include discovery of solution of the quantum problem of three and more particles and the multidimensional inverse problem of scattering theory; discovery of the correct rules of quantization of Yang–Mills fields; research in the quantum inverse scattering method; research in the infrared parameterisation of Yang–Mills field.

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Background

Faddeev was born in Leningrad to a family of mathematicians. His father, Dmitry Faddeev, was a well known algebraist, professor of Leningrad University and member of the Russian Academy of Sciences. His mother, Vera Faddeeva, was known for her work in numerical linear algebra.

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Education

Graduate, Leningrad State University, 1956. Doctor in Physical and Mathematics Sciences, Leningrad State University, 1963.

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Career

He is famous for the discovery of the Faddeev equations in the theory of the quantum mechanical three-body problem and for the development of path integral methods in the quantization of non-abelian gauge field theories, including the introduction (with Victor Popov) of Faddeev–Popov ghosts. He led the Leningrad School, in which he along with many of his students developed the quantum inverse scattering method for studying quantum integrable systems in one space and one time dimension. This work led to the invention of quantum groups by Drinfeld and Jimbo.

He enrolled in physics, rather than mathematics, "to be independent of father".

Nevertheless, he received a solid education in mathematics as well "due to the influence of V. A. Fock and V. I. Smirnov". His doctoral work, on scattering theory, was completed in 1959 under the direction of Olga Ladyzhenskaya.

From 1976 to 2000, Faddeev was head of the Saint St. Petersburg Department of Steklov Institute of Mathematics of Russian Academy of Sciences (PDMI RAS). In 1988 he founded the Euler International Mathematical Institute, now a department of PDMI RAS.

## Membership

National Academy of Sciences. Russian Academy of Sciences. Academy of Sciences of the Union of the Soviet Socialist Republics.

French Academy of Sciences.

Royal Society; Chinese Academy of Sciences. American Academy of Arts and Sciences.

Royal Swedish Academy of Sciences]

Faddeev has been a member of the Russian Academy of Sciences since 1976, and is a member of a number of foreign academies, including the United States National Academy of Sciences, the French Academy of Sciences, and the Royal Society.