Robert Kayen

Nigerian entrepreneur | Imo State University, University of Lagos | Lagos: May 20, 1990 - California: December 3, 2010 | Chidi Nwaogu - Dominic Chidiebere

University of the Basque Country | May 20, 1983 - Bonn: June 2, 1956 | Jessica Ruiz Pérez (Jessica Ruiz Perez) | May 20, 1983 - Bonn: June 2, 1956

Estonian physicist | May 20, 1981 - November 5, 2017 | Maarja Grossberg-Kuusk | May 20, 1981 - November 5, 2017

Indian scientist | Fellow of the Royal Society of Chemistry | University of Kaiserslautern, Anna University | Arumanai: May 20, 1976 - New Brunswick: April 11, 2020

Hungarian academic and degrowth researcher | Corvinus University of Budapest, Heriot-Watt University, Diplomatic Academy of Vienna | Budapest: May 20, 1975

Kazakh politician | Al-Farabi Kazakh National University | Jambyl Region: May 20, 1975 - Halle (Saale): August 31, 1741 | Baglan Mailybaev | Jambyl Region: May

British science writer and doctor | Association of British Science Writers, Robert B. Balles Prize in Critical Thinking (2006) | Bad Pharma, Bad Science, AllTrials

philosopher | Celje: May 20, 1971 - Warsaw: September 17, 1929 | Katarina Majerhold | Celje: May 20, 1971 - Warsaw: September 17, 1929

composer and mathematician | Pennsylvania State University | Kyiv: May 20, 1970 - Philadelphia: September 5, 1854 | Alexey Shor - Alexey Vladimorovich

German physicist | Alexander von Humboldt Professorship (2009), Maxwell Medal and Prize (2004), Max Born Prize (2012) | Imperial College London, University of Göttingen

Czech chemist and academic | Faculty of Mathematics and Physics, Charles University | Prague: May 20, 1966 - Brno: April 7, 1938 | Pavel Jungwirth | Prague

German professor | Free University Berlin | Bocholt: May 20, 1962 - 15th arrondissement of Paris: July 1, 2016 | Ursula Lehmkuhl | Bocholt: May 20, 1962 - 15th

German chemist | Sieglar: May 20, 1961 - Saint Petersburg: April 27, 1756 | Udo Kragl | Sieglar: May 20, 1961 - Saint Petersburg: April 27, 1756

Korean physicist | Korea University | South Korea: May 20, 1960 - Formia: December 5, -0042 | Sun Kee Kim | South Korea: May 20, 1960 - Formia: December 5, -0042

German philosopher | Bergkamen: May 20, 1959 - July 7, 2021 | Konrad Ott | Bergkamen: May 20, 1959 - July 7, 2021

German mathematician | Fellow of the American Mathematical Society (2013), Australian Mathematical Society Medal (1991), Gauss Lectureship (2002), Gottfried

Slovak politician and minister of the interior | Comenius University | Bratislava: May 20, 1957 - Stockholm: December 29, 1905 | Vladimír Palko (Vladimir

American scientist imprisoned for attempted espionage | NASA Exceptional Achievement Medal | University of Arizona, Massachusetts Institute of Technology

Indian mathematician | Jeffery–Williams Prize (2023), Ferran Sunyer i Balaguer Prize (1996), Fellow of the American Mathematical Society (2022)

American chemist | Chemical Pioneer Award (2021), Fellow of the American Academy of Arts and Sciences (2022), Centenary Prize (2011), Ronald Breslow Award for

Mexican mathematician, researcher, academic | Ferran Sunyer i Balaguer Prize (2012), Ferran Sunyer i Balaguer Prize (2005) | University of Oxford, National

Mathematician and politician from the Central African Republic | Fellow of the American Mathematical Society (2022) | Université de Montréal | Paoua: May 20

Mexican political scientist | National Autonomous University of Mexico | Mexico City: May 20, 1953 - Biella: March 14, 1884 | José Fernández Santillán (Jose

Indian chemist | Shanti Swarup Bhatnagar Prize for Science and Technology (1993) | Savitribai Phule Pune University, Indian Institute of Technology Kanpur

Russian-Estonian writer | Order of the White Star, Order of the White Star, 4th Class | Faculty of Philology of Saint Petersburg State University

American philosopher | Honorary doctor of the University of Liège (2015) | CUNY Graduate School and University Center | Baltimore: May 20, 1947 - Baku: May 30, 2016

Kazakhstani chemist | Dostyk Order of grade II, Order of Parasat, Medal "10 years of Astana", Medal VDNKh, school medal, commemorative medal for the ten years

French university professor | Paris 8 University, Paris Nanterre University | Villefranche-sur-Saône: May 20, 1946 - January 1, 1020 | Alain Brossat

Dutch philosopher and politician | Vrije Universiteit Amsterdam | Lemmer: May 20, 1946 - Moscow: October 11, 2020 | Sybe Schaap | Lemmer: May 20, 1946

Spanish politician and physicist, former vice president of the European Parliament (1999-2014) | Officer of the Legion of Honour (2008), Commander with Star of

French mathematician | École polytechnique | Paris: May 20, 1945 - Utrecht: March 13, 1925 | Nicolas Bouleau | Paris: May 20, 1945 - Utrecht: March 13, 1925

Austrian quantum physicist | Knight Commander's Cross of the Order of Merit of the Federal Republic of Germany (2009), Johannes Kepler Award, Clarivate

scientist | Honoured Higher education employee of the Russian Federation | Kazan Federal University | Siñgel: May 20, 1944 - Kazan: July 15, 2015 | Daniä

German mathematician | Gay-Lussac-Humboldt-Prize (2002), Fellow of the Institute of Mathematical Statistics (2007), Cantor medal (2006), honorary doctor of

Soviet and Ukrainian engineer (1940–2012) | Order of Merit (Ukraine), 2nd class (2004), Order of Merit (Ukraine), 3rd class (2001), Miner's Glory 2nd class

American physicist | Messenger Lectures, Science Writing Award, ICTP Dirac Medal (2023), Sakurai Prize (1998), Pomeranchuk Prize (2008) | string theory, The

Russian scientist | Honoured Higher education employee of the Russian Federation | Moscow University's Department of Philosophy (1969) | May 20, 1940 - January 1, 2023

German biochemist and chaos theorist | Berlin: May 20, 1940 - Montagnola: December 16, 1970 | Otto Rössler (Otto Rossler) | Berlin: May 20, 1940 - Montagnola

Ukrainian scientist | Stavropol State University | May 20, 1938 - April 14, 1963 | Oleksandr Lahunov | May 20, 1938 - April 14, 1963 | Stavropol State University

Soviet and Russian mathematician and economist | L. Kantorovich Prize | Mathematics and Mechanics Faculty, St. Petersburg State University | Saint Petersburg

Dutch mathematician, historian of mathematics and historian (1937-2014) | University of Amsterdam, Harvard University | Haarlem: May 20, 1937 - Heidelberg: June 16, 2014

Estonian computer scientist and mathematician (1935-2020) | Prize of Soviet Estonia (1967), Scientific Prize of The Republic of Estonia (2017), USSR State

Czech archeologist, archivist, essayist, philosopher and historian (1933–2011) | Faculty of Arts, Charles University in Prague | Brno: May 20, 1933 - Brno

French mathematician | University of Paris, École Normale Supérieure | Rabat: May 20, 1932 - 16th arrondissement of Paris: February 11, 2022 | Jean Bénabou

belgian-born American philosopher (1932–2020) | Guggenheim Fellowship | Yale University, University of Chicago | Belgium: May 20, 1932 - September 18, 2020

Hungarian chemist | Bóly: May 20, 1932 - Budapest: August 10, 2007 | Tibor Bérces (Tibor Berces) | Bóly: May 20, 1932 - Budapest: August 10, 2007

American electrical engineer | Paris Junior College, Texas A&M University | Paris: May 20, 1931 - January 1, 2022 | James R. Biard. Bob | Paris: May 20, 1931

Japanese scientist | Japan Academy Prize, Bristol-Myers Squibb Award for Distinguished Achievement in Cardiovascular Research (1996) | Kyoto University, Yale University

German politician and physicist (1930-2011) | National Prize of East Germany (1974) | Humboldt University of Berlin | Berlin: May 20, 1930 - Ludwigsfelde: March 14, 2011

May 20, 1927 - Helsinki: April 13, 1963 | Haakon Waadeland | May 20, 1927 - Helsinki: April 13, 1963

scientist | Suqovuşan: May 20, 1926 - Baku: February 18, 2014 | Calal Aliyev | Suqovuşan: May 20, 1926 - Baku: February 18, 2014

Polish physicist | honorary doctor of the University of Lille (1967), Commander with Star of the Order of Polonia Restituta, Knight of the Order of Polonia

German chemist and university teacher | Bijvoet Medal (1993), Claude S. Hudson Award in Carbohydrate Chemistry (1985), Emil Fischer Medal (1980), Fresenius

scientist | May 20, 1920 - October 27, 1997 | Paşa Rüstəmov (Pasa Rustəmov) | May 20, 1920 - October 27, 1997

Canadian academic and mathematician (1920–2006) | Officer of the National Order of Quebec (1993), Prix Armand-Frappier (1994) | Princeton University

Azerbaijani scientist | Order of the Patriotic War 1st class, Order of the Badge of Honour, Order of the Patriotic War 2nd class | Samukh District: May 20

philosopher of law (1912-1984) | honorary doctor of the Hebrew University of Jerusalem (1969), Francqui Prize (1962) | Free University of Brussels | Warsaw

American philosopher (1912-1989) | Carus Lectures (1977), Rhodes Scholarship (1934) | University of Göttingen, Lycée Montaigne, Oriel College, University of

Soviet engineer (1909–1953) | Stalin Prize | Bauman Moscow State Technical University | Luhansk: May 20, 1909 - Saint Petersburg: December 30, 1953 | Arnold

wife of Otto Benesch | May 20, 1905 - March 28, 1983 | Eva Benesch - Eva Steiner | May 20, 1905 - March 28, 1983

Dutch chess player and mathematician | world chess champion | University of Amsterdam | Amsterdam: May 20, 1901 - Amsterdam: November 26, 1981 | Max Euwe

German chemist (1900-1996) | Bunsen Medal (1979), Erwin Schrödinger Prize (1970), Wilhelm Exner Medal (1957) | Humboldt University of Berlin | Munich: May 20

British athlete (1897-1986) | Military Cross | Magdalen College | London: May 20, 1897 - Alton: November 22, 1986 | Malcolm Nokes | London: May 20, 1897

Italian philosopher (1897–1937) | Carlo Cattaneo the federalist, The Original Sin | Lodi: May 20, 1897 - Barcelona: May 5, 1937 | Camillo Berneri | Lodi: May

USSR chemist (1895-1975) | Medal "For Valiant Labour in the Great Patriotic War 1941–1945", Order of Lenin | Perm State University | Perm: May 20, 1895

Chinese mathematician, educator (1891-1927) | Harvard University, Cornell University | May 20, 1891 - June 12, 1927 | Hu Mingfu | May 20, 1891 - June 12, 1927

German geophysicist (1888-1974) | Bavarian Order of Merit | Tübingen: May 20, 1888 - Munich: September 22, 1974 | Winfried Otto Schumann | Tübingen: May 20

mineralogist, Moscow University | Medal "For Valiant Labour in the Great Patriotic War 1941–1945", Honoured Worker of Science and Technology of the RSFSR

Spanish scientist | A Coruña: May 20, 1880 - A Coruña: June 12, 1948 | Celia Brañas - Celia Brañas y Fernández (Celia Branas) | A Coruña: May 20, 1880

Spanish physicist (1878-1945) | Grand Cross of Naval Merit with white badge (1936), honorary doctorate from the University of Strasbourg (1933) | Universidad Central

German mathematician (1874–1943) | Hartogs' extension theorem, Hartogs' theorem, Hartogs number, Hartogs–Rosenthal theorem | Humboldt University of Berlin

Polish chemist (1870-1935) | Technische Universität Berlin | Płock: May 20, 1870 - Poznań: May 23, 1935 | Julian Flatau | Płock: May 20, 1870 - Poznań: May 23, 1935

French mathematician (1870-1937) | Order of Leopold (1933), Grand prix des sciences mathématiques (1906) | University of Paris | Villeurbanne: May 20, 1870

German physicist and mathematician (1870–1945) | Leipzig University | Wrocław: May 20, 1870 - Jersey City: December 21, 1945 | Arthur Korn | Wrocław: May

French politician and historian (1862–1938) | Prize Louis Ancel (1945) | Lycée Henri-IV | Paris: May 20, 1862 - Paris: June 6, 1938 | André Berthelot

American mathematician (1862–1943) | Wesleyan University, Vassar College, University of Göttingen | Cazenovia: May 20, 1862 - Poughkeepsie: May 20, 1943

American engineer (1861-1919) | Henry Laurence Gantt Medal (1929) | Gantt chart, Work, Ways and Profit | Johns Hopkins University, Stevens Institute of

German chemist (1907 Nobel Prize) | Nobel Prize in Chemistry (1907), Liebig Medal (1905) | Ludwig-Maximilian-University in Munich, Technical University of

Canadian suffragist and philosopher (1856-1933) | Dalhousie University | Halifax: May 20, 1856 - Halifax: September 5, 1933 | Eliza Ritchie | Halifax: May 20

German organic chemist (1852-1927) | University of Göttingen | Wińsko: May 20, 1852 - Brunswick: November 13, 1927 | Friedrich Oskar Giesel | Wińsko: May

German-born American inventor (1851–1929) | National Inventors Hall of Fame (1994), Elliott Cresson Medal (1913), John Scott Award (1897), Franklin Medal

British evolutionary biologist (1848–1894) | Croonian Medal and Lecture (1876), Fellow of the Royal Society | Gonville and Caius College | Kingston: May 20

Swiss physicist and politician (1843-1917) | Geneva: May 20, 1843 - Le Grand-Saconnex: July 22, 1917 | Édouard Sarasin (Edouard Sarasin) | Geneva: May 20

Russian physiologist (1840-1891) | Order of Saint Anna, 2nd class, Order of St. Vladimir, 3rd class, Order of Saint Stanislaus, 1st class | Kazan Imperial

American minister (1825–1921) | National Women's Hall of Fame (1993) | The Sexes Throughout Nature | Oberlin College | Henrietta: May 20, 1825 - Elizabeth

May 20, 1821 - Würzburg: December 23, 1516 | Axel Nyblæus (Axel Nyblaeus) | May 20, 1821 - Würzburg: December 23, 1516

American chemist (1814–1901) | Dublin: May 20, 1814 - St. Louis: September 22, 1901 | Abram Litton | Dublin: May 20, 1814 - St. Louis: September 22, 1901

British philosopher and political economist (1806–1873) | Honorary Fellow of the Royal Society of Edinburgh, honorary doctor of the University of Vienna

German stenographer (1798–1867) | Berlin: May 20, 1798 - Berlin: January 8, 1867 | Heinrich August Wilhelm Stolze | Berlin: May 20, 1798 - Berlin: January 8, 1867

American academic (1793-1850) | Fellow of the American Academy of Arts and Sciences | Harvard College, Harvard Medical School | Boston: May 20, 1793 - August 30, 1850

British politician (1772–1828) | Fellow of the Royal Society, International Space Hall of Fame (1979) | Newcome's School, Wolverhampton Grammar School, Trinity College

British-American physician, inventor, painter and architect (1759-1828) | Magellanic Premium (1792) | University of Edinburgh, University of Aberdeen | Jost

American academic | Magellanic Premium (1792) | May 20, 1743 - July 22, 1824 | Robert Patterson | May 20, 1743 - July 22, 1824 | Magellanic Premium (1792)

German philosopher and theologian | Königsberg: May 20, 1716 - Königsberg: September 30, 1785 | Friedrich Samuel Bock | Königsberg: May 20, 1716

Italian philosopher (1639-1723) | Positano: May 20, 1639 - Naples: May 10, 1723 | Lucantonio Porzio | Positano: May 20, 1639 - Naples: May 10, 1723

1586-1666) | Goes: May 20, 1586 - Middelburg: December 19, 1666 | Cornelis Eversdijk | Goes: May 20, 1586 - Middelburg: December 19, 1666