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Olga Aleksandrovna Ladyzhenskaya (Russian: Ольга Александровна Ладыженская, IPA: [ˈolʲɡə ɐlʲɪˈksandrəvnə ɫɐˈdɨʐɨnskəɪ̯ə] ⓘ; 7 March 1922 – 12 January 2004) was a Russian mathematician who worked on partial differential equations, fluid dynamics, and the finite-difference method for the Navier–Stokes equations.
Olga (centre front) with her father, Alexander III, 1888. Back row (left to right), her siblings and mother: Grand Duke Michael, Empress Marie, Grand Duke Nicholas (later Nicholas II), Grand Duchess Xenia and Grand Duke George. Olga was the youngest daughter of Emperor Alexander III and his consort, Empress Marie, formerly Princess Dagmar of ...
The original such inequality, for functions of two real variables, was introduced by Ladyzhenskaya in 1958 to prove the existence and uniqueness of long-time solutions to the Navier–Stokes equations in two spatial dimensions (for smooth enough initial data). There is an analogous inequality for functions of three real variables, but the ...
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She earned a Ph.D. in 1960 from the same university, under the supervision of Olga Ladyzhenskaya, [4] [5] and completed her D.Sc. (the Soviet equivalent of a habilitation) in 1964. [4] She joined the faculty of Leningrad State University in 1959, and was promoted to professor in 1968 and department head in 1974. [1]
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His doctoral work on scattering theory was completed in 1959 under the direction of Olga Ladyzhenskaya. [ 2 ] From 1976 to 2000, Faddeev was head of the St. Petersburg Department of Steklov Institute of Mathematics of Russian Academy of Sciences (PDMI RAS). [ 3 ]
American Airlines Flight 5342 and a U.S. Army Black Hawk collided in Washington, D.C. Authorities believe all 67 on board both aircraft died.