Olga Aleksandrovna Ladyzhenskaya - (Obituary) by Arnol'd, V, Birman, MS, Vershik, A, Vishik, M, Gel'fand, I, Ibragimov, I, Maslov, V, Novikov, S, Seregin, G, Sinai, Y, Solomyak, M, Solonnikov, V, Ural'tseva, N, Faddeev, L