Which mathematician was the father of physicist Nikolai Borisovich Delone: Jakow Trachtenberg or Boris Delaunay?
Boris Delaunay Boris Nikolaevich Delaunay or Delone (Russian: Бори́с Никола́евич Делоне́ ; March 15, 1890 – July 17, 1980) was one of the first Russian mountain climbers and a Soviet/Russian mathematician, and the father of physicist Nikolai Borisovich Delone.
Symeon of Polotsk Symeon of Polotsk or Symeon Polotsky (born "Samuel Piotrowski-Sitnianowicz", Russian: Симео́н По́лоцкий; Самуи́л Петро́вский-Ситнянович; December 12, 1629, Polotsk - August 25, 1680, Moscow) was an academically-trained Baroque Belarusian-born Russian poet, dramatist, churchman, and enlightener who laid the groundwork for the development of modern Russian literature.