Azerbaijani scientist | Baku State University | Barda: September 21, 1988 - Kraków: November 11, 1936 | Səbuhi Qəhrəmanov | Barda: September 21, 1988

Norwegian non-fiction writer and researcher | University of Oslo | Bensberg: September 21, 1982 - Fécamp: December 13, 1904 | Sarah Roxana Herlofsen

American businessman | Stanford University, Stanford Graduate School of Business | Malaysia: September 21, 1979 - Freiburg im Breisgau: June 20, 1920 | Ren Ng

Russian scientist | Kazan Federal University | Sosnogorsk: September 21, 1971 - Saint Petersburg: November 21, 2021 | Iskender Yasaveyev | Sosnogorsk

American mathematician | Art of Problem Solving | Princeton University | Idaho Falls: September 21, 1971 - Montclair: September 18, 2018 | Richard Rusczyk

philosopher, poet, writer and film director | Let's not live like slaves, I fight therefore I am, Love and Revolution | Martigues: September 21, 1970

British mathematician | Senior Berwick Prize (2008), Whitehead Prize (2002), Berwick Prize (2008), Smith's Prize (1993) | The Royal Grammar School, High

Czech publicist and politician | Faculty of Education, Charles University | Prague: September 21, 1967 - Madrid: April 15, 1917 | Michal Semín (Michal Semin)

American mathematician | Fellow of the American Mathematical Society (2017), Fellow of the Association for Women in Mathematics (2024) | University of

Italian writer, journalist and composer (1967–2023) | University of Padua | Sestino: September 21, 1967 - Montescudo: December 30, 2023 | Fabio Fracas

Armenian control theorist | IEEE Fellow, Society of Women Engineers Achievement Award (2015), Fellow of the American Institute of Aeronautics and Astronautics

Philosopher, Princess III, the third of Hatkhola royal family | South Point School | Kolkata: September 21, 1965 - September 10, 1975 | Uma Dhar | Kolkata

Ukrainian philosopher | Honored Scientist of Ukraine | Taras Shevchenko National University of Kyiv | Chernivtsi: September 21, 1964 - Paris: January 12, 1643

Ph.D. Georgia Institute of Technology 1991 | IEEE Fellow | Texas Tech University, Georgia Tech | Havre: September 21, 1963 - Paris: July 28, 1988 | Larry Heck

American entrepreneur, sports team owner and thoroughbred horse breeder | Widener University | Philadelphia: September 21, 1961 - West Palm Beach: July 21, 2014

American mathematician | Queen's University, Massachusetts Institute of Technology | Hsinchu City: September 21, 1959 - Königsbronn: January 28, 1752 | Paul

Slovene mathematician | John L. Synge Award (2018), Fellow of the American Mathematical Society (2020), Euler Medal (2010), Decoration of Merit (2024), Fellow

German physicist | Gottfried Wilhelm Leibniz Prize (2000), Gay-Lussac-Humboldt-Prize (2005) | Ludwig-Maximilian-University in Munich, Technical University of Munich

American legal scholar, writer, blogger (b. 1954) | Holberg International Memorial Prize (2018), Goldsmith Book Prize | Middlesex School, Harvard College

French chemist | Grand prix Pierre-Süe (2011), Knight of the Legion of Honour (2009), Fellow of the Royal Society of Chemistry, Foreign Member of the Royal

Venezuelan researcher and chemist | Simón Bolívar University | Buenos Aires: September 21, 1953 - January 1, 1914 | Benjamín Scharifker (Benjamin

Danish physicist | H. C. Ørsted Gold Medal (2024), Carlsberg Foundation Research Prize (2015), Villum Kann Rasmussen Annual Award (1993), Fellow of the

Swedish cognitive scientist | CSS Fellow | Lund University | Sweden: September 21, 1949 - Turón: October 9, 1934 | Peter Gärdenfors (Peter Gardenfors)

French mathematician | Servant Prize (1994) | École Normale Supérieure | Pauligne: September 21, 1947 - Bogotá: May 17, 1994 | Jean Lannes | Pauligne

Spanish scientist | Medalla de Oro de Canarias (2017) | University of La Laguna | Tacoronte, Tenerife: September 21, 1947 - Gorizia: August 29, 1855 | Basilio

Russian physicist and politician | Fellow of the American Association for the Advancement of Science (2008), State Prize of the Russian Federation, Russian

Canadian astronaut (1945–2022) | University of British Columbia, Richmond Secondary School, Western University | Reykjavík: September 21, 1945 - London: April 5, 2022

Danish teacher | September 21, 1944 - August 30, 2015 | Louis Beketov Nielsen | September 21, 1944 - August 30, 2015

Azerbaijani chemist | Baku State University | Baku: September 21, 1942 - Baku: May 9, 2017 | Nazil Canibeyov | Baku: September 21, 1942 - Baku: May 9, 2017

Russian linguist (1941–1941) | Faculty of Oriental Studies of the St. Petersburg University | Yekaterinburg: September 21, 1941 - Tashkent: March 17, 1970

Polish philosopher | Prize of the Foundation for Polish Science (2013), Kraków Book of the Month, Officer of the Order of Polonia Restituta (2011), Medal of

Austrian civil engineer | TU Wien | Villach: September 21, 1940 - Vienna: January 23, 2020 | Hermann Knoflacher | Villach: September 21, 1940 - Vienna: January 23, 2020

Iranian physicist | Sanandaj: September 21, 1939 - February 14, 2006 | Mozaffar Partowmah | Sanandaj: September 21, 1939 - February 14, 2006

Russian mathematician | honorary doctorate of the Łódź University of Technology (2013) | Saratov State Technical University | Kyiv: September 21, 1937

Russian politician (1936–2019) | Dr. Friedrich Joseph Haass-Preis (2001), Order of the Polar Star, Medal "Veteran of Labour", Medal "Defender of a Free

Odesa University | September 21, 1935 - Massachusetts: January 1, 2001 | Askold Fedorovitch Nazarenko | September 21, 1935 - Massachusetts: January 1, 2001

Russian mathematician (1935-2012) | Odesa University | Odesa: September 21, 1935 - Chelyabinsk: August 3, 2012 | Vadim Mogilnitsky | Odesa: September 21, 1935

Russian-American mathematician | Henri Poincaré Prize (2009), Wolf Prize in Mathematics (1997), Fellow of the American Mathematical Society (2013), Steele

British physicist (1934–2019) | Holweck Prize (1980), IOP Dirac Medal (1993), Fellow of the Royal Society, Fellow of the American Physical Society, Fritz

Canadian-American applied mathematician and computer scientist | Fellow of the American Physical Society | University of Cambridge, University of British Columbia

Russian physicist | Medal "For the Defence of Leningrad", Jubilee Medal "Forty Years of Victory in the Great Patriotic War 1941–1945" | Faculty of Physics

American physicist and neurobiologist (1926–2013) | Nobel Prize in Physics (1960), Guggenheim Fellowship, Fellow of the American Physical Society, Elliott

Soviet physicist (1923-2015) | Order of the Red Star, Order of the Patriotic War 1st class, USSR State Prize, Jubilee Medal "50 Years of the Armed Forces of

Israeli physicist (1920-2017) | Hebrew University of Jerusalem | Baden: September 21, 1920 - Jerusalem: May 8, 2017 | Norbert Nahum Kristianpoller | Baden

American mathematician (1920-2006) | University of California, Berkeley | September 21, 1920 - January 20, 2006 | William Mann | September 21, 1920 - January

Pakistani philosopher (1919–1988) | University of the Punjab, University of Oxford | Khyber Pakhtunkhwa: September 21, 1919 - Chicago: July 26, 1988 | Fazlur

Argentine-Canadian philosopher (1919-2020) | Guggenheim Fellowship, Princess of Asturias Award for Communications and Humanities (1982), honorary doctorate of

Russian scientist | Moscow Institute of Philosophy, Literature, and History | Russian Socialist Federative Soviet Republic: September 21, 1918 - Russia: June 8, 2005

American scientist (1918–2007) | Right Livelihood Award (1992) | Oberlin College | Cleveland: September 21, 1918 - San Francisco: August 15, 2007 | John

American academic administrator (1918–1996) | Northwestern University, University of Florida | Jacksonville: September 21, 1918 - Pensacola: January 10, 1996

American mathematician | Doane University | Dorchester: September 21, 1911 - United States: September 13, 2003 | Julena Steinheider Duncombe - Julena

German-American scientist | Order of Merit of the Federal Republic of Germany, Officer's Cross of the Order of Merit of the Federal Republic of Germany

Uruguayan lawyer | Montevideo: September 21, 1909 - March 12, 1976 | Aúthos Pagano (Authos Pagano) | Montevideo: September 21, 1909 - March 12, 1976

Russian State University for the Humanities | September 21, 1909 - Moscow: June 27, 2018 | Dmitry Baburin | September 21, 1909 - Moscow: June 27, 2018

Bulgarian chemist | Dimitrov Prize medal, Order of Georgi Dimitrov | Sofia University | Vratsa: September 21, 1905 - Sofia: January 7, 1986 | Aleksandŭr

American physicist (1901–1994) | Fellow of the American Physical Society, Richtmyer Memorial Lecture Award (1949) | Cornell College, University of Wisconsin–Madison

Polish mathematician (1899–1943) | Schauder fixed point theorem, Schauder basis, open mapping theorem, Schauder estimates, degree of an analytic mapping

Italian psychologist (1897-1989) | University of Padua | Dolo: September 21, 1897 - Milan: March 21, 1989 | Cesare Musatti - Cesare Luigi Eugenio Musatti

American mathematician (1895-1973) | Walsh function, Walsh–Hadamard code, Walsh matrix, Grace–Walsh–Szegő theorem, Walsh–Lebesgue theorem | University

Spanish aeronautical engineer and pilot; inventor of the autogyro (1895-1936) | FAI Gold Air Medal (1932), Fellow of the Royal Aeronautical Society, Elliott

Argentine psychiatrist and philosopher (1894–1972) | University of Buenos Aires | Buenos Aires: September 21, 1894 - Córdoba: January 1, 1972 | Gregorio

Czech aircraft engineer | Žamberk: September 21, 1894 - Prague: September 6, 1963 | Miroslav Hajn | Žamberk: September 21, 1894 - Prague: September 6, 1963

Indian mathematician | Smith's Prize (1917), Rao Bahadur (1937) | University of Cambridge, Presidency College | Chennai: September 21, 1893 - Mumbai: January 22, 1966

Polish mathematician (1886–1945) | Commander of the Order of Polonia Restituta | Faculty of Physics and Mathematics of the Saint Petersburg University

Romanian mechanician and mathematician | University of Bucharest, University of Göttingen | Galați: September 21, 1885 - Bucharest: June 21, 1970 | Victor

Hungarian mathematician (1884-1944) | Hungarian algorithm, König's theorem, König's lemma | Eötvös Loránd University, University of Göttingen, Budapest

Romanian journalist and literary critic, also remembered for his work in anthropology, ethnography, sociology and zoology (1875-1951) | Humboldt University of

American writer | Mahanoy City: September 21, 1872 - Coral Gables: May 2, 1953 | Robert Hiester Montgomery | Mahanoy City: September 21, 1872 - Coral Gables: May 2, 1953

Spanish academic and politician (1870–1940) | University of Paris, University of Madrid, Complutense University of Madrid | costanilla de Santiago: September

Swedish inventor (1870–1931) | Arvika Västra parish: September 21, 1870 - Vasa parish: July 5, 1931 | Oscar Kjellberg | Arvika Västra parish: September 21

agricultural and veterinary scientist (1853–1921) | Yale University (1879), Worcester Polytechnic Institute (1871), Yale University (1874) | Northbridge

Dutch physicist, Nobel prize winner (1853-1926) | Rumford Medal (1912), Nobel Prize in Physics (1913), Matteucci Medal (1910), Franklin Medal (1915), Foreign

Faculty of Physics and Mathematics of Moscow Imperial University | September 21, 1850 - Moscow: September 30, 1985 | Sergey Nezhdanovsky | September 21

Russian mathematician | ETH Zurich, University of Bern | Tula Governorate: September 21, 1845 - January 1, 1919 | Elizaveta Litvinova - Елизавета

German pathologist (1835-1926) | University of Würzburg | Würzburg: September 21, 1835 - Halensee: December 2, 1926 | Karl Joseph Eberth | Würzburg

Czech composer (1833–1913) | Prague: September 21, 1833 - Prague: June 3, 1913 | Josef Richard Rozkošný (Josef Richard Rozkosny) | Prague: September 21

French physicist (1832–1913) | Officer of the Legion of Honour (1889), Order of Charles III, Davy Medal (1878), La Caze Prize of the Academy of Sciences

September 21, 1828 - Heidelberg: July 21, 1904 | Friedrich Ewers | September 21, 1828 - Heidelberg: July 21, 1904

John Allan Broun FRS (21 September 1817 – 22 November 1879) was a Scottish magnetician and meteorologist | Keith Medal (1859), Fellow of the Royal Society

American geologist (1809–1845) | Rensselaer Polytechnic Institute | Troy: September 21, 1809 - Lake Superior: October 13, 1845 | Douglass Houghton | Troy

German engineer and physicist (1801–1874) | International Exposition 1867 (1867), Demidov Prize (1840), noble title (1864) | electric motor, naval mine

German poet and author (1792–1854) | Conversations with Goethe | University of Göttingen | Winsen: September 21, 1792 - Weimar: December 3, 1854 | Johann

Scottish engineer and road-builder | Ayr: September 21, 1756 - Moffat: November 26, 1836 | John Loudon McAdam | Ayr: September 21, 1756 - Moffat: November 26, 1836

German theologian (1738-1809) | Sulechów: September 21, 1738 - Frankfurt (Oder): February 3, 1809 | Gotthilf Samuel Steinbart | Sulechów: September 21, 1738

Serbian theologian, writer,historian | National University of Kyiv-Mohyla Academy | Sremski Karlovci: September 21, 1726 - Kovilj: December 22, 1801 | Jovan

Russian academic | Slavic Greek Latin Academy, Saint Petersburg State University | Constantinople: September 21, 1708 - Paris: April 11, 1744 | Antiochus

German Lutheran theologian and moral philosopher (1610–1671) | Martin Luther University Halle-Wittenberg | Schlettau: September 21, 1610 - Lutherstadt