Were both Alexander Kronrod and Leonty Magnitsky mathematicians?
Leonty Magnitsky Leonty Filippovich Magnitsky (Russian: Леонтий Филиппович Магницкий ), born Telyatin (Russian: Телятин ), (June 9, 1669, Ostashkov – October 19, 1739, Moscow) was a Russian mathematician and educator.
Mark Vishik Mark Vishik (also Marko Vishik, Russian: Марк(o) Иосифович Вишик , October 19, 1921, Lviv – June 23, 2012) was a mathematician from Lwów / Lemberg / Lvov / Lviv, who worked in the field of Partial Differential Equations.