Stanislav Andreyevich Smirnov (Russian: Станислав Андреевич Смирнов ; born 11 May 1995) is a Russian football player who plays for FC Irtysh Omsk.
Stanislav Konstantinovich Smirnov (Russian: Станисла́в Константи́нович Cмирно́в ; born 3 September 1970) is a Russian mathematician currently working at the University of Geneva.
 He was awarded the Fields Medal in 2010.
 His research involves complex analysis, dynamical systems and probability theory.
Ivan Nikolayevich Smirnov (Russian: Иван Николаевич Смирнов ), born 9 September 1955 in Moscow, USSR, is regarded as one of the greatest guitar players in Russia.
 He plays many different styles like fusion, world, Russian folk, folk-jazz, and new flamenco.
 Smirnov lives in Russia and plays with musicians such as Michael Smirnov, Sergey Klevensky, Dmitry Safonov, and Aleksei Kozlov.
The Mikheyev–Smirnov–Wolfenstein effect (often referred to as "matter effect") is a particle physics process which can act to modify neutrino oscillations in matter.
 Works in 1978 and 1979 by American physicist Lincoln Wolfenstein led to understanding that the oscillation parameters of neutrino are changed in matter.
 In 1985, the Soviet physicists Stanislav Mikheyev and Alexei Smirnov predicted that slow decrease of the matter density can resonantly enhance the neutrino mixing.
 Later in 1986, Stephen Parke of Fermilab, Hans Bethe of Cornell University, and S. Peter Rosen and James Gelb of Los Alamos National Laboratory provided analytic treatments of this effect.
Presidential elections were held in the breakaway republic of Transnistria on 22 December, 1996.
 They were won by the incumbent Igor Smirnov, who has ruled Transnistria since 1991.
 Smirnov's only opponent was Vladimir Malakhov, who was beaten by Smirnov, 72% to 20%.
Dmitri Nikolayevich Smirnov (Russian: Дмитрий Николаевич Смирнов ; born 9 November 1980 in Moscow) is a Russian footballer.
 He is not related to Dmitry Alexandrovich Smirnov with whom he played on the same team for several years for FC Torpedo-ZIL Moscow, Luch and Tom.
 To avoid confusion, he is usually referred to as Dmitri N. Smirnov.
Presidential elections were held in the breakaway republic of Transnistria on 1 December, 1991.
 These were the first such elections in the newly founded Pridnestrovian Moldavian Republic, and were won by Igor Smirnov, one of the country's founders.
 Smirnov faced two opponents: Grigore Mărăcuţă and Grigoriy Blagodarniy.
 Mărăcuţă would become an ally of Smirnov and was speaker of the Supreme Council until 2005.
Georgy Fotev (Bulgarian: Георги Фотев ) (born August 24, 1941) is a Bulgarian sociologist.
 His scientific works are in the areas of theory and history of sociology and the disciplinary fields of modern sociology.
 The focus of the research interests of G.Fotev is the nature of sociology as a multiple paradigm science.
 Another major theme in the works of Georgy Fotev is the dialogue as a base and horizon of multiple paradigm sociology.
 Georgy Fotev has publications in the fields of historical sociology, sociology of politics, ethnosociology, the crisis of legitimacy, sociology of values, etc.
 His books "The long night of communism in Bulgaria" and "Bulgarian melancholy" throw light on the dramatic fate of the Bulgarian national society.
 Georgy Fotev was Minister of Education and Science (1991 - 1992).
 He is professor emeritus of New Bulgarian University.
 In 2003 he was awarded the Distinguished Service Award from the American University in Bulgaria.
Stanislav of Lesnovo (Serbian: Станислав Лесновски ; 1330–42) or Stanislav Gramatik (Станислав Граматик), was a Serbian writer, a scribe in the monastery of Lesnovo.
 Judging from his secular name, he was not a monk but a layman.
 He was most probably from Štip, according to the inscription ("I, Stanislav Gramatik of Štip") he left in the Church of St. George in Gornji Kozjak.
 He lived and created his works in the Serbian state of King Stefan Dečanski and his son Stefan Dušan, in the first half of the 14th century.
 Stanislav is the most important representative of the monastic literary center established in the monastery of Lesnovo in this period.
 The monastery of Lesnovo was in this period in the stage of renovation.
 As a crown of this process it was completely rebuilt by Jovan Oliver in 1341.
 We know for sure that Stanislav worked in Lesnovo for at least twelve years.
Georgy Maximovich Adelson-Velsky (Russian: Гео́ргий Макси́мович Адельсо́н-Ве́льский ; name is sometimes transliterated as Georgii Adelson-Velskii) (8 January 1922 – 26 April 2014) was a Soviet and Israeli mathematician and computer scientist.

Question: Stanislav Smirnov and Georgy Adelson-Velsky, were both what?
Answer: mathematician