The “Google Doodle” shown on the Google search page on 7 March 2019 depicted Olga Aleksandrovna Ladyzhenskaya, a Russian mathematician, on the 97th anniversary of her death.

She was known for her work on partial differential equations (especially Hilbert’s nineteenth problem, about classes of partial differential equations which admit analytic functions as solutions) and fluid dynamics. She provided the first rigorous proofs of the convergence of a finite difference method for the Navierâ€“Stokes equations.

She did all that despite her father being killed by the Stalinist secret police in 1937, and she herself being consequently blocked from entry into Leningrad University.

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