Helmut H. Schaefer

Austrian cyclist, mathematician | Cyclist of the year (Austria) (2021) | University of Cambridge, TU Wien, Polytechnic University of Catalonia | Kirchdorf an

Spanish scientist | Bilbao: February 14, 1990 - Georgetown: February 27, 1879 | Lorea Argarate - Lorea | Bilbao: February 14, 1990 - Georgetown: February 27, 1879

German mathematician and politician | Technische Universität Berlin | Berlin: February 14, 1985 - Leipzig: September 19, 1749 | Simon Weiß (Simon Weiss)

American lawyer and academic | Pembroke College, Harvard Law School, Blind Brook High School, The Wharton School, John F. Kennedy School of Government

Italian mathematician, professor of numerical modelling EPF Lausanne | Collatz Prize (2015) | University of Pavia, University of Milan | Milan: February 14

American physicist | LeRoy Apker Award (1993), Watson, Helen, Miles, and Audrey Davis Prize (2013), Pfizer Award (2007), Fellow of the American Physical Society

Ukrainian lawyer and jurist | Honored Jurist of Ukraine | Institute of International Relations of Taras Ševčenko National University of Kjiv | Bobrynets

British mathematician | Feltrinelli Prize (2011), Breakthrough Prize in Mathematics (2018), Cole Prize in Algebra (2009), Fellow of the Royal Society (2019)

Taiwanese wetland scientist | National Taipei University, Harvard University, Arizona State University | Kaohsiung: February 14, 1966 - Yekaterinburg: January 19, 2012

Austrian mathematician | Kardinal-Innitzer-Preis | University of Salzburg | Salzburg: February 14, 1960 - Pyatigorsk: August 3, 1841 | Gerhard Larcher

researcher | Resurrección Maria Azkue Award (1990) | Bilbao: February 14, 1960 - January 20, 2023 | Jose Maria Pitarke | Bilbao: February 14, 1960 - January 20, 2023

Udmurt State University | February 14, 1960 - March 3, 2013 | Vladimir Ivshin | February 14, 1960 - March 3, 2013 | Udmurt State University

South Korean scientist | Seoul National University, Princeton University | Gwangju: February 14, 1957 - Voorburg: July 20, 1977 | Chang Hee Nam | Gwangju

Dr. rer. nat. Rheinische Friedrich-Wilhelms-Universität Bonn 1979 | ETH Zurich, University of Bonn | Krefeld: February 14, 1956 - Toulouse: October 29, 1676

Azerbaijani scientist | Azerbaijan State Oil and Industrial University | Vanati: February 14, 1954 - Wauwatosa: January 3, 2020 | Zakir Məhərrəmov | Vanati

Russian mathematician | Merited Scientist of the Russian Federation (2007), Order of Friendship (2003) | Novosibirsk State University | Grom: February 14, 1953

Soviet and Russian scientist in aviation materials | Order "For Merit to the Fatherland", 3rd class, USSR State Prize, Order of Merit of the Republic of

British public speaker and hereditary peer (born 1952) | Cardiff University, Harrow School, Churchill College | February 14, 1952 - January 1, 1888

Hungarian mathematician | Fulkerson Prize (1985) | Eötvös Loránd University, Hungarian Academy of Sciences | Budapest: February 14, 1952 - July 31, 2017

Mexican philosopher | National Autonomous University of Mexico, Complutense University of Madrid | Pichucalco: February 14, 1951 - Barcelona: October 11, 1916

German mathematician and computer scientist | ETH Zurich, University of Zurich | Solingen: February 14, 1950 - Pécs: August 27, 1984 | Joachim von zur Gathen

Excellence in Education of Ukraine Badge (2003), Honored Art Worker of Ukraine (1998) | Kharkiv Conservatory | February 14, 1948 - March 6, 2021 | Serhiy

Ukrainian mathematician | anniversary medal for the 20 years of independence of Ukraine, Order of Princess Olga, 3rd class, Order of Princess Olha | Garasimiv

Hungarian mathematician, zen teacher | Ózd: February 14, 1941 - Göttingen: September 17, 1749 | Antal Dobosy | Ózd: February 14, 1941 - Göttingen: September 17, 1749

University of Göttingen | February 14, 1941 - November 27, 2023 | Ulrich Güntzer (Ulrich Guntzer) | February 14, 1941 - November 27, 2023

1940-2023) | University of Amsterdam, József Attila Gimnázium, Eötvös Loránd University | Budapest: February 14, 1940 - Amsterdam: July 11, 2023 | Peter

German scientist (1938–2024) | doctor honoris causa from the Pierre and Marie Curie University (2005), Alfred Stock Memorial Prize (2000)

Belarusian mathematician | Medal "Veteran of Labour" | Maxim Tank Belarusian State Pedagogical University | Simferopol: February 14, 1937 - Moscow: August 27, 1956

German physicist | Robert Wichard Pohl Prize (2009), Karl Heinz Beckurts Award (2006), BBVA Foundation Frontiers of Knowledge Award (2013), Wolf Prize in Physics (2011)

German mathematician | Free University Berlin | Berlin: February 14, 1932 - April 8, 2024 | Klaus Habetha | Berlin: February 14, 1932 - April 8, 2024 | Free

Russian geologist | Jubilee Medal "50 Years of Victory in the Great Patriotic War 1941–1945", Order of Lenin, Honored Geologist of the Russian Federation

French mathematician and political activist (1932–1957) | École militaire préparatoire d'Autun, Science Faculty of Paris, lycée Gautier, University of Algiers 1

Russian mathematician (1932–2015) | Merited Scientist of the Russian Federation | Bauman Moscow State Technical University | Khabarovsk: February 14, 1932

Russian mathematician (1931–2010) | Refal, Metacompilation, Physicists are joking, Thesis defense (satirical play) | MSU Faculty of Physics, Moscow State University

German physicist (1930-2015) | National Prize of East Germany | Greußen: February 14, 1930 - Jena: October 19, 2015 | Günter Albrecht (Gunter Albrecht)

Soviet and Russian physicist, TV host (1928-2012) | Academy of Sciences of Moldova, Gold Medal of the Russian Academy of Sciences for outstanding achievements

American mathematician (1926-1986) | Russo–Dye theorem | University of Chicago, Rensselaer Polytechnic Institute | Dunkirk: February 14, 1926 - Los Angeles

German physicist (1925-2008) | Humboldt Prize, Humboldt Research Fellowship | University of Freiburg | Badenweiler: February 14, 1925 - Badenweiler: August 3, 2008

Bulgarian philosopher and writer (1915-2011) | Sofia University | Bratsigovo: February 14, 1925 - 14th arrondissement of Paris: March 7, 2011 | Slavy Boyanov

American nutritionist | Bristol-Myers Squibb Award for Distinguished Achievement in Nutrition Research (1994) | University of Chicago, Ohio State University

American mathematician (1917-2011) | Nobel Prize in Chemistry (1985), honorary doctor of the Bar-Ilan University (1990), honorary doctorate of the Łódź

University of Santiago de Compostela | February 14, 1914 - Saint Petersburg: September 1, 1908 | Antonio Fernández del Riego (Antonio Fernandez del Riego)

Dutch rally driver and inventor (1911-1998) | Gombong: February 14, 1911 - Heemstede: November 29, 1998 | Maus Gatsonides | Gombong: February 14, 1911

Dutch medical researcher (1911–2009) | John Scott Award (1983), Russ Prize (2003), Harvey Prize (1972), Righteous Among the Nations (2012), National

Russian artillery designer (1907–1980) | Order of the Red Banner of Labour, Order of the Red Star, Stalin Prize, Order of the Badge of Honour | Baltic State

February 14, 1905 - January 1, 2018 | Robert Gellerstad | February 14, 1905 - January 1, 2018

Norwegian resistance member (1901-1944) | Drammen Municipality: February 14, 1901 - Skagerrak: September 8, 1944 | Petter Moen | Drammen Municipality: February

Medal "For Valiant Labour in the Great Patriotic War 1941–1945", Medal "For the Defence of Leningrad", Order of the Badge of Honour | Bogomolets National

Swiss astronomer who posited dark matter (1898-1974) | Gold Medal of the Royal Astronomical Society (1972), Medal of Freedom (1949), International Space Hall

Argentine writer and scholar (1898–1959) | Corrientes: February 14, 1898 - Buenos Aires: May 30, 1959 | Raúl Scalabrini Ortiz (Raul Scalabrini Ortiz)

British astrophysicist and mathematician (1896-1950) | Fellow of the Royal Society (1926), Royal Medal (1941), Bakerian Lecture (1929), Gold Medal of the Royal

German philosopher and sociologist (1895–1973) | honorary citizen of Frankfurt am Main, Goethe Plaque of the City of Frankfurt (1953), Goethe-Plakette des

American physicist (1894–1971) | doctor honoris causa from the University of Lyon (1957), John Fritz Medal (1959), IRI Medal (1954), IEEE Fellow, Fellow of

Regent of Bulgaria (1890–1977) | Karl Marx Gold Medal, Hero of Socialist Labour, Order of Lenin, Hero of the People's Republic of Bulgaria, Order of Georgi Dimitrov

German mathematician (1888-1942) | Krull–Schmidt theorem, Remak decomposition | Humboldt University of Berlin, Frederick William University Berlin | Berlin

French physicist and meteorologist (1885–1935) | 9th arrondissement of Paris: February 14, 1885 - Paris: June 17, 1935 | Pierre Idrac | 9th arrondissement of

Pakistani philosopher | February 14, 1885 - June 19, 1949 | Syed Zafarul Hasan | February 14, 1885 - June 19, 1949

German chemist (1882-1950) | Munich: February 14, 1882 - Greppin: January 1, 1950 | Angelo Knorr | Munich: February 14, 1882 - Greppin: January 1, 1950

Japanese mathematician and historian of mathematics (1881-1946) | University of Tokyo | Tsu: February 14, 1881 - Fukushima: October 12, 1946 | Matsusaburō

American botanist (1878-1936) | Mendel Medal (1936), American Institute of Chemists Gold Medal (1935), William H. Nichols Medal (1935), National Inventors Hall

American radio pioneer (1877–1956) | IEEE Medal of Honor (1926) | Harvard University | Portland: February 14, 1877 - Newton: January 8, 1956 | Greenleaf

German Jewish mathematician (1877-1938) | big O notation, Landau's function, Landau's problems, Landau–Ramanujan constant, Landau's constants

American inventor (1873–1943) | February 14, 1873 - October 17, 1943 | Fannie S. Spitz | February 14, 1873 - October 17, 1943

French philosopher, feminist and novelist (1872–1942) | Marcelin Guérin Prize (1917), Knight of the Legion of Honour, Officer of the French Order of

Scottish physicist and meteorologist (1869-1959) | Royal Medal (1922), Gunning Victoria Jubilee Prize, Howard N. Potts Medal (1925), Dennis Gabor Medal and

Kazan Federal University, Kazan 3rd Men's Gymnasium | February 14, 1868 - January 1, 1918 | Vladimir Vorms | February 14, 1868 - January 1, 1918 | Kazan

Portuguese writer | University of Porto | Porto: February 14, 1866 - First Portuguese Republic: March 10, 1923 | Basílio Teles (Basilio Teles) | Porto

German chemist pioneer in surface science | Laura R. Leonard Prize (1931) | Venice: February 14, 1862 - Brunswick: November 21, 1935 | Agnes Pockels | Venice

American engineer (1859-1896) | Ferris Wheel | Rensselaer Polytechnic Institute | Galesburg: February 14, 1859 - Pittsburgh: November 22, 1896 | George

Danish physician (1855-1911) | Leipzig University, University of Copenhagen | Copenhagen: February 14, 1855 - Copenhagen: February 3, 1911 | Christian Bohr

Italian physicist (1850-1909) | Commander of the Order of Saints Maurice and Lazarus, grand officer of the Order of the Crown of Italy | Polytechnic University of Milan

German-American inventor (1847–1898) | Kassel: February 14, 1847 - Brooklyn: October 13, 1898 | Christian Dancel | Kassel: February 14, 1847 - Brooklyn

Finnish chemist | University of Zurich | Vyborg: February 14, 1845 - Munich: March 28, 1925 | Lydia Sesemann | Vyborg: February 14, 1845 - Munich: March 28, 1925

Austrian physicist | Leipzig University | Vienna: February 14, 1843 - Vienna: November 7, 1864 | Otto von Littrow | Vienna: February 14, 1843 - Vienna: November 7, 1864

German mathematician (1839–1873) | Hankel matrix, Hankel function | Humboldt University of Berlin, Leipzig University, University of Göttingen | Halle

German pharmacologist (1839-1908) | Officer of the Legion of Honour (1896) | University of Königsberg, University of Tübingen, Humboldt University of Berlin

American inventor (1838–1914) | National Inventors Hall of Fame (2006) | fab lab | York: February 14, 1838 - Framingham: October 12, 1914 | Margaret E.

American marine biologist (1832–1872) | Harvard University | Boston: February 14, 1832 - Ilchester: May 26, 1872 | William Stimpson | Boston: February 14

Tatar educator, linguist, writer, historian and ethnographer. (1825–1902) | Keçe Şırdan: February 14, 1825 - Kazan: September 2, 1902 | Qäyüm Nasıyri

American politician (1819–1890) | National Inventors Hall of Fame (2001), John Scott Award (1875) | Mooresburg: February 14, 1819 - Milwaukee: February 17, 1890

French chemist (1814-1896) | Officer of the Legion of Honour (1868) | Paris: February 14, 1814 - Villefranche-sur-Mer: March 24, 1896 | Julien-François

French philosopher (1806-1863) | École polytechnique, Mines ParisTech | Lyon: February 14, 1806 - Paris: June 28, 1863 | Jean Reynaud | Lyon: February 14

surgeon, chemist, lecturer, consultant, architect, builder, gentleman scientist, inventor (1793–1875) | Knight Bachelor | limelight | Padstow: February 14

Italian chemist and inventor (1761-1818) | University of Pavia | Pavia: February 14, 1761 - Pavia: October 24, 1818 | Luigi Valentino Brugnatelli | Pavia

German astronomer | Fürth: February 14, 1722 - Ilovlya: August 24, 1774 | Georg Moriz Lowitz | Fürth: February 14, 1722 - Ilovlya: August 24, 1774

German theologian and philosopher (1710-1791) | University of Greifswald, Friedrich-Ludwig-Jahn-Gymnasium | Greifswald: February 14, 1710 - Greifswald: March 1, 1791

Genevan politician (1652-1728) | Geneva: February 14, 1652 - Geneva: June 8, 1728 | Daniel Le Clerc | Geneva: February 14, 1652 - Geneva: June 8, 1728

Secretary of the Royal Society and Bishop of Chester | Mathematical Magick, An Essay towards a Real Character and a Philosophical Language, The discovery of a