Harald Ludvig Westergaard

Czech politician | Bezdědovice: April 19, 1987 - Danderyd Municipality: June 25, 1992 | Adam Scheinherr | Bezdědovice: April 19, 1987 - Danderyd

German mathematician | European Prize in Combinatorics (2017) | University of Rostock, Ludwig-Maximilian-University in Munich | Starnberg: April 19, 1984

Peruvian illusionist | Lima: April 19, 1979 - Jena: February 3, 1900 | George Iglesias - Jorge Luis Ricardo Larrabure Iglesias (George | El Mago George

Kenyan political scientist (born 1978) | Whitman College, University of Minnesota | Kenya: April 19, 1978 - New Milford: November 24, 1978 | Wanjiru

Russian scientist | Russian government prize for science and technology (2005) | Bashkir State University (1997) | Semyono-Petrovskoye: April 19, 1975 - January 27, 1943

Soviet poet | Triumph, Russia Award (2005) | National University of Uzbekistan | Namangan: April 19, 1971 - Almaty: January 9, 2012 | Evgeniy Viktorovitsj

French mathematician | Boulogne-Billancourt: April 19, 1970 - Shawangunk Ridge: October 3, 1971 | Charles-Albert Lehalle | Boulogne-Billancourt: April 19, 1970

American physicist | University of North Carolina at Chapel Hill, Harvard University, North Carolina School of Science and Mathematics | April 19, 1965

April 19, 1963 - August 13, 2021 | İradä Hüseynova (Irada Huseynova) | April 19, 1963 - August 13, 2021

Austrian specialist in literature | Austrian National Award for Literary Criticism (2023), Ehrenzeichen des Landes Steiermark für Wissenschaft, Forschung und

Russian scientist in aircraft airworthiness and life-cycle management, writer on air law | Golden Idea national award (2015), Jubilee Medal «100 Years of

Russian mathematician | Specialized Educational Scientific Center of NSU, Novosibirsk State University, Omsk State Pedagogical University | Omsk: April 19

Australian chemist | Fellow of the Australian Academy of Science (1994), Member of the Order of Australia (2016), Rennie Memorial Medal (1982), Moyal Medal

Hungarian footballer | Eötvös Loránd University, University of Szeged | Szeged: April 19, 1951 - Oberwolfach: April 4, 1949 | Dezső Csejtei (Dezso Csejtei)

Uruguayan philosopher | Montevideo: April 19, 1950 - April 20, 1858 | Fernando Flores Morador | Montevideo: April 19, 1950 - April 20, 1858

German chemist and former Second Gentleman of Germany | Kołos Medal (2009), Foreign Member of the Royal Society (2018), Schrödinger Medal (2019), Friedrich

Russian astrophysicist | Medal of the Order "For Merit to the Fatherland", 2nd class, ICTP Dirac Medal (2019), Kavli Prize in Astrophysics (2014), Medal "For

philosopher, academic (1947-) | Sondrio: April 19, 1947 - Freiburg im Breisgau: June 9, 1977 | Luigi Vero Tarca | Sondrio: April 19, 1947 - Freiburg im

Professor of Computer Science at Harvard University and former Dean of Harvard College; noted author | Roxbury Latin School, Harvard University | Boston: April

Spanish scientist and chemist | Medal of Merit in Research and University Education (2019), honorary doctorate of the University of the Basque Country (2013)

Russian scientist | A.N. Krylov Prize (2007) | MSU Faculty of Mechanics and Mathematics | Moscow: April 19, 1945 - Novosibirsk: August 31, 2013 | Mikhail

French philosopher | prix Gegner (2007) | Paris Nanterre University, École normale supérieure de Saint-Cloud | Paris: April 19, 1944 - 14th arrondissement of

American electrical engineer | University of Southampton, Duke University | Canton: April 19, 1943 - Bergamo: May 2, 1979 | Thomas A. Furness III | Canton

Estonian mathematician | Moscow State University | Jõhvi: April 19, 1942 - Saint Petersburg: February 27, 1887 | Mati Kilp | Jõhvi: April 19, 1942 - Saint

Italian teacher and philosopher | Modena: April 19, 1942 - The Hague: June 24, 1942 | Pier Aldo Rovatti | Modena: April 19, 1942 - The Hague: June 24, 1942

American chemist | honorary doctorate of the Masaryk University (1992), ACS Award in Analytical Chemistry (2006) | Brno: April 19, 1942 - St. Louis: December 5, 2017

American chemist | Fellow of the American Association for the Advancement of Science (2007), National Medal of Science (2012), Mildred Cohn Award in Biological

American physicist | Fellow of the American Association for the Advancement of Science (2009), Irving Langmuir Award in Chemical Physics (1997), Guggenheim

Russian scientist | Medal of the Order "For Merit to the Fatherland", 2nd class | Ural State University | Yekaterinburg: April 19, 1937 - October 5, 2022

Slovene mathematician Ph.D. University of Ljubljana 1965 | University of Ljubljana | Ljubljana: April 19, 1935 - Ljubljana: October 19, 2008 | Anton Suhadolc

Catholic cardinal | Pontifical Ecclesiastical Academy, Our Lady Queen of Angels Seminary, The Catholic University of America, Pontifical Gregorian University

Swiss sociologist | Blue Planet Award (2012), Chevalier des Arts et des Lettres, Al-Gaddafi International Prize for Human Rights (2002), honorary doctor of

Soviet and Russian physicist | Merited Scientist of the Russian Federation, Republic of Tatarstan State Award for Science and Technology, Order of the Red

American computer scientist (1931–2022) | IEEE John von Neumann Medal (1993), honorary doctor of ETH Zürich (1991), ACM Distinguished Service Award (1987)

South Korean physicist | Seoul: April 19, 1929 - Heusenstamm: December 9, 2005 | Kyu-Myung Chung | Seoul: April 19, 1929 - Heusenstamm: December 9, 2005

American physicist (1928–2025) | Enrico Fermi Award (1996), AAAS Award for Scientific Freedom and Responsibility (1988), Presidential Medal of Freedom

Chinese pharmaceutical chemist | Academician of the Chinese Academy of Sciences (1991) | Tsinghua University | Beijing: April 19, 1924 - Shanghai: March 27, 2021

German mathematician | Officer's Cross of the Order of Merit of the Federal Republic of Germany | University of Freiburg | Villingen-Schwenningen: April 19

American mathematician (1921–2006) | Chauvenet Prize (1964), Guggenheim Fellowship, Paul R. Halmos - Lester R. Ford Awards | Princeton University, Columbia University

American broadcast executive (1919–2008) | Bronze Star Medal | Harvard University, University of California, Berkeley | April 19, 1919 - November 2, 2008

German physicist (1913–2018) | Officer's Cross of the Order of Merit of the Federal Republic of Germany | Neunkirchen: April 19, 1913 - March: April 17, 2018

American chemist (1912–1999) | Vannevar Bush Award (1988), Fellow of the Committee for Skeptical Inquiry, Nobel Prize in Chemistry (1951), National Medal of

British cryptanalyst, chess player, and chess writer (1909–1974) | Companion of the Order of St Michael and St George (1970), Officer of the Order of the

Russian engineer | Medal "Veteran of Labour", Medal "For Valiant Labour in the Great Patriotic War 1941–1945", Jubilee Medal "Thirty Years of Victory in the

French mathematician (1905-1979) | Ehresmann's theorem, Ehresmann connection | University of Göttingen, Princeton University, Lycée Kléber, École Normale Supérieure

Finnish chemist | Memorial medal of the Continuation War, Memorial medal of the Winter War, Commander of the Order of the White Rose of Finland, Commander of

Norwegian physicist | University of Oslo | April 19, 1902 - September 21, 1970 | Leiv Harang | April 19, 1902 - September 21, 1970 | University of Oslo

Japanese mathematician who worked in the theory of several complex variables (1901-1978) | Order of Culture (1960), Asahi Prize (1954), Person of Cultural

Italian mathematician (1885-1946) | Bronze Medal of Military Valour, Mathematical Prize of the Italian Academy of Sciences (1923), Bressa Prize (1933), War

Austrian physicist and mathematician (1883-1953) | Fellow of the Institute of Mathematical Statistics (1941), honorary doctor of the Vienna Technical

April 19, 1883 - Gdańsk: October 24, 1985 | Ladislav Seifert | April 19, 1883 - Gdańsk: October 24, 1985

Russian mathematician (1880-1948) | Slutsky equation, Slutsky's theorem, Slutsky's lemma | Technical University of Munich, Taras Shevchenko National University of Kyiv

American inventor (1880–1966) | IEEE Medal of Honor (1958), Fellow of the American Physical Society, Howard N. Potts Medal (1923), IEEE Morris N. Liebmann

Swedish mathematician (1866–1927) | Björkén Prize (1910), Poncelet Prize (1908) | Fredholm operator, Fredholm alternative, Fredholm integral equation

Polish psychologist | Navahrudak: April 19, 1865 - December 30, 1940 | Josepha Kodis | Navahrudak: April 19, 1865 - December 30, 1940

Russian Jewish socialist and political thinker, philosopher and theoretician of Jewish socialism, diaspora nationalism, and Yiddish culture (1865–1943)

French chemist and professor | Commander of the Legion of Honour, Jecker Prize (1907) | Mourenx: April 19, 1863 - Biarritz: June 13, 1929 | Charles Moureu

American academic administrator (1861–1933) | Princeton Theological Seminary, Princeton University, Peoria High School, Humboldt University of Berlin

Russian physician (1859–1932) | Order of St. Vladimir, 3rd class, Order of Saint Stanislaus, 1st class, Order of St. Vladimir, 4th class, Order of Saint

Serbian physicist | Negotin: April 19, 1858 - Paris: December 24, 1921 | Đorđe Stanojević (Dorde Stanojevic) | Negotin: April 19, 1858 - Paris: December 24, 1921

19th and 20th-century analytical chemist and academic | Newcastle upon Tyne: April 19, 1858 - Newcastle upon Tyne: January 3, 1939 | John Thomas Dunn

New Zealand photographer and inventor (1855–1924) | Surrey: April 19, 1855 - Sydney: June 1, 1924 | William Tyree | Surrey: April 19, 1855 - Sydney: June 1, 1924

German engineer and inventor (1847-1914) | Dresden: April 19, 1847 - Berlin: February 18, 1914 | Hermann Rietschel | Dresden: April 19, 1847 - Berlin: February 18, 1914

Born: 19 April 1846 in Millsboro, Washington County, Pennsylvania, USA; Died: 27 January 1927 in Biddle, Power River County, Montana, USA | Millsboro: April

French botanist and biologist (1839–1914) | Commander of the Legion of Honour (1909) | École Normale Supérieure, Science Faculty of Paris | Bailleul: April

Spanish author (1832-1916) | Grand Cross of Naval Merit with white badge (1905), Knight of the Order of the Golden Fleece (1911), Grand Cross of the Military

Belgian writer (1832-1883) | Châtelineau: April 19, 1832 - Acoz Castle: April 30, 1883 | Octave Pirmez | Châtelineau: April 19, 1832 - Acoz Castle: April 30, 1883

Utrecht University, Leiden University | April 19, 1831 - Ghent: June 27, 1976 | A.C. Oudemans | April 19, 1831 - Ghent: June 27, 1976 | Utrecht University

French plant physiologist and agricultural chemist (1830-1902) | Officer of the Legion of Honour | École d'administration, Lycée Chaptal, Muséum national

American inventor and industrialist | Botetourt County: April 19, 1806 - Springfield: June 11, 1866 | James Leffel | Botetourt County: April 19, 1806

German scientist (1801-1887) | honorary citizen of Leipzig (1884) | Kreuzschule, Leipzig University | Żarki Wielkie: April 19, 1801 - Leipzig: November 18, 1887

French mathematician and military personnel | École royale du génie de Mézières | Besançon: April 19, 1748 - Montpellier: March 21, 1822 | Charles

German author (1689–1761) | Berlin: April 19, 1689 - Berlin: January 12, 1761 | Abraham von Humbert | Berlin: April 19, 1689 - Berlin: January 12, 1761

German mathematician and astronomer (1635-1714) | Schleusingen: April 19, 1635 - Kiel: November 22, 1714 | Samuel Reyher | Schleusingen: April 19, 1635 - Kiel