Who was born first, Pavel Alexandrov or Grigory Margulis?
Pavel Alexandrov Pavel Sergeyevich Alexandrov (Russian: Па́вел Серге́евич Алекса́ндров ), sometimes romanized Paul Alexandroff or Aleksandrov (7 May 1896 – 16 November 1982), was a Soviet mathematician. He wrote about three hundred papers, making important contributions to set theory and topology.
Osip Petrov Osip Afanasievich Petrov (Russian: Осип Афанасиевич Петров , 15 November [O.S. 3 November] 1806 12 March [O.S. 28 February] 1878 ) was a Russian operatic bass-baritone of great range and renown, whose career centred on St Petersburg.