Question: Lev Pontryagin and Leonty Magnitsky were both what?
Sentence (from "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.
Relevant evidence: Yes