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.
Nikolai Pylchykov Nikolai Dmitrievich Pilchikov (Russian: Николай Дмитриевич Пильчиков , 2 April 1857, Kharkov, Russian Empire – 19 May 1908, Kharkov, Russian Empire) was a Russian physicist, inventor, and geologist. He is known for the discovery of the photovoltaic effect, new properties of X-rays, and ways to control various mechanisms of the radio provided a basis of radio control.