Spanish mathematician | Ferran Sunyer i Balaguer Prize (2023), Doctoral Degree Extraordinary Award (2014), Stampacchia Medal (2021), European Research Council

French mathematician | École polytechnique | Lyon: April 1, 1977 - Atlanta: August 1, 1932 | Denis Auroux | Lyon: April 1, 1977 - Atlanta: August 1, 1932

South Korean scientist | Clarivate Citation Laureates (2014) | University of Alberta | Seoul: April 1, 1969 - Poznań: January 21, 1865 | Charles Lee | Seoul

Portuguese scientist | Porto: April 1, 1967 - January 1, -0400 | Rui L. Reis | Porto: April 1, 1967 - January 1, -0400

Polish physicist | University of Gdańsk | Ciechanów: April 1, 1966 - Denver: January 9, 1903 | Grażyna Żebrowska (Grazyna Zebrowska) | Ciechanów: April 1

Polish writer | Warsaw: April 1, 1966 - Venice: August 31, 1563 | Konrad T. Lewandowski | Warsaw: April 1, 1966 - Venice: August 31, 1563

German professor | University of Innsbruck, University of Bamberg | Lichtenfels: April 1, 1965 - 15th arrondissement of Paris: July 1, 2016 | Uwe Voigt

Author, commentator, ethicist, and activist | Monash University, Scarsdale High School, Wesleyan University, University of Melbourne | Port Chester: April 1

French Islamic leader | Officer of the National Order of Merit (2015) | Mohamed I University, University of Montpellier | Figuig: April 1, 1964 - February 17, 2023

researcher | University of Cape Town Faculty of Science, University of KwaZulu-Natal | South Africa: April 1, 1964 - January 23, 2022 | Janet L Scott | South

Israeli-American physicist, geneticist, and mathematician | Individual Mentored Research Scientist Development Award, Faculty Early Career Development (CAREER)

French mathematician | Blaise-Pascal Award (1996) | École polytechnique, Pierre and Marie Curie University | April 1, 1963 - Harpenden: October 27, 1953

Indian scientist | Lal Bahadur Shastri National Award (2012) | Government Engineering College, Thrissur | Alappuzha: April 1, 1963 - June 15, 1949 | Tessy

German physicist | Heidelberg University | Bremen: April 1, 1962 - Farnham: June 25, 1879 | Johannes Wessels | Bremen: April 1, 1962 - Farnham: June 25, 1879

human-computer interaction research scientist | ACM Distinguished Member (2006), ACM Fellow (2010) | Harbin: April 1, 1961 - January 1, 1581 | Shumin Zhai

Indian mathematician | Fellow of the Institute of Mathematical Statistics (2002), Shanti Swarup Bhatnagar Prize for Science and Technology (2004) | Indian

French Philosopher of Science, epistemologist | Commander of the French Order of Academic Palms (2014), Jean-Perrin Prize (1997), Knight of the Legion of

researcher | Canton of Valais: April 1, 1958 - Sydney: April 15, 2018 | Jean-Luc Veuthey | Canton of Valais: April 1, 1958 - Sydney: April 15, 2018

American scientist | Fellow of the American Academy of Arts and Sciences, NAS Award in Molecular Biology (1993), Ho-Am Prize in Science (1998) | Cornell

Irish physicist | Joseph A. Burton Forum Award (2009) | University of Birmingham, University of Manchester | April 1, 1957 - San Francisco: May 30, 2019

Ukrainian physicist | Honored Scientist of Ukraine, Order of Merit, 1st class, Honorary Diploma of the Cabinet of Ministers of Ukraine, Order of Merit

Chinese political philosopher | Duke University, Nanjing University | Qidong: April 1, 1955 - Beijing: April 30, 1928 | Gu Su | Qidong: April 1, 1955

Tunisian politician | University of Toulouse | April 1, 1953 - March 24, 2015 | Moncef Ben Salem | April 1, 1953 - March 24, 2015 | University of Toulouse

mathematician | Académie de Stanislas (2019), Gaston-Julia Award (1976), Prix Paul Doistau-Émile Blutet de l’Information Scientifique (1999), Albert

French philosopher (1952–2020) | Officer of Arts and Letters (2016) | Aimer, s'aimer, nous aimer : du 11 septembre au 21 avril, Réenchanter le monde : la

Russian scientist | Order "For Merit to the Fatherland", 4th class, Prize of the Government of the Russian Federation in the field of education, Medal "In

German mathematician and politician | Dank Medal, Georg Schulhoff Award (2016), Order of Merit of the Federal Republic of Germany | Leipzig University

German mathematician and computer scientist | Dornbirn: April 1, 1950 - March 21, 2018 | Peter Göhner (Peter Gohner) | Dornbirn: April 1, 1950 - March 21, 2018

French philosopher | Ravensburg: April 1, 1948 - Paris: January 1, 1632 | Denis Vernant | Ravensburg: April 1, 1948 - Paris: January 1, 1632

Ukrainian poet and sociologist | Excellence in Education of Ukraine Badge, Medal "Veteran of Labour" | Streptiv: April 1, 1947 - Mariupol: May 8, 2022 | Bohdan

physicist | Fellow of the Higher Education Academy, Fellow of the Institute of Physics, Dennis Gabor Medal and Prize (2014) | University of Oxford, University

French mathematician | Crafoord Prize in Mathematics (2001), honorary doctor of the Université libre de Bruxelles (2010), honorary doctorate at the University

Croatian philosopher | Faculty of Humanities and Social Sciences, University of Zagreb, University of Ljubljana | Budapest: April 1, 1947 - Tübingen: April 29, 1943

Croatian physicist | Humboldt Prize, Humboldt Research Fellowship, Fellow of the American Physical Society | Cornell University | Zagreb: April 1, 1946 - January 1, 1948

Indian physicist (1946-2016) | Humboldt Prize | St. Stephen's College, University of Pennsylvania, University of Delhi | New Delhi: April 1, 1946 - New Delhi

Japanese chemist | Person of Cultural Merit (2008) | University of Tokyo | Tokyo: April 1, 1943 - Hanover: October 7, 1795 | Akira Isogai | Tokyo: April 1

French philosopher | Granville: April 1, 1943 - Heemstede: November 23, 2020 | Jean-Louis Benoît (Jean-Louis Benoit) | Granville: April 1, 1943 - Heemstede

Armenian scientist | National Polytechnic University of Armenia | Shushikend: April 1, 1940 - November 11, 2009 | Gourgen Hovsepyan | Shushikend: April 1, 1940

American physicist | Fellow of the American Academy of Arts and Sciences (1989), Fellow of the American Association for the Advancement of Science (2016)

Russian scientist | Order of Alexander Nevsky, Order "For Merit to the Fatherland", 3rd class, Order "For Merit to the Fatherland", 4th class, Order of Honour

Pakistani nuclear engineer (1936–2021) | Fellow of Pakistan Academy of Sciences, Grand Cross of the Order of Excellence (1999), Sitara-i-Imtiaz, Hilal-i-Imtiaz

American logician | Steele Prize for Seminal Contribution to Research (2003), Hausdorff medal (2015), Gödel Lecturer (1990) | American University, University of Bonn

Max Pine School | April 1, 1935 - 5th arrondissement of Paris: October 8, 2004 | Didi Vardi | April 1, 1935 - 5th arrondissement of Paris: October 8, 2004

French physicist (born 1933) | honorary doctor of the Hebrew University of Jerusalem (1998), honorary doctor of the University of Uppsala (1994), Grand Cross

applied mathematician | Fellow of the American Association for the Advancement of Science (2007), Guggenheim Fellowship (1978), Fulbright Scholarship | Courant

Romanian philosopher | Supur: April 1, 1932 - Dublin: August 29, 1975 | Mircea Flonta | Supur: April 1, 1932 - Dublin: August 29, 1975

Armenian politician | Armenian National Agrarian University | Nerkin Bazmaberd: April 1, 1932 - Yerevan: June 5, 2001 | Khachik Safaryan | Nerkin Bazmaberd

German philosopher | Pforzheim: April 1, 1930 - Belfast: January 16, 1866 | Frithjof Rodi | Pforzheim: April 1, 1930 - Belfast: January 16, 1866

academic mathematician and engineer | University of British Columbia, University of Alberta | Læsø: April 1, 1929 - Abbotsford: August 9, 2007 | Gustav S.

Polish physicist (1928-2011) | Silver Cross of Merit | Adam Mickiewicz University in Poznań | Barcin: April 1, 1928 - Poznań: May 13, 2011 | Jerzy Pietrzak

German mathematician (1928–1971) | Goethe University Frankfurt | Berlin: April 1, 1928 - Tübingen: January 28, 1971 | Peter Dembowski | Berlin: April 1

Spiritual and political leader (1926–2003) | University of Allahabad | Meerut: April 1, 1926 - Islamabad: December 11, 2003 | Shah Ahmad Noorani | Meerut

American mathematician | University of Pennsylvania | April 1, 1920 - February 6, 2002 | Lowell Schoenfeld | April 1, 1920 - February 6, 2002 | University of

Japanese medical doctor and scientist | Kitasato Shibasaburō Memorial Award | Tokyo Women's Medical University | Tokyo: April 1, 1918 - Kobe: April 21, 2016

American aircraft designer (1917-2000) | Stevens Institute of Technology | Rostov-on-Don: April 1, 1917 - February 10, 2000 | Igor Bensen | Rostov-on-Don

Japanese mathematician (*1916 – †1986) | Kamikawate: April 1, 1916 - January 1, 1986 | Gisiro Maruyama | Kamikawate: April 1, 1916 - January 1, 1986

honorary doctor of the RWTH Aachen University (1964), Commander's Cross of the Order of Merit of the Federal Republic of Germany (1986) | April 1, 1915

Swedish mathematician (1908–2001) | Fellow of the Institute of Mathematical Statistics (1965) | Uppsala University | Mölltorp: April 1, 1908 - Gothenburg

French philosopher (1905–1950) | Paul Flat Prize (1931) | Existentialism and Activism | lycée du Parc, Complutense University of Madrid, Grenoble Alpes University

Czech photographer and chemical engineer (1901–1991) | Roudnice nad Labem: April 1, 1901 - Brno: January 1, 1991 | Jan Lauschmann | Roudnice nad Labem: April

European-educated Israeli physicist | faculty of science, German University in Prague, Charles University | Deliatyn: April 1, 1900 - New York City: April 26, 1959

American child prodigy (1898-1944) | The Animate and the Inanimate, The Tribes and the States | Harvard University, Harvard Law School | Manhattan: April 1

Italian mathematician (1897-1964) | Polesine Parmense: April 1, 1897 - Milan: October 6, 1964 | Ugo Cassina | Polesine Parmense: April 1, 1897 - Milan: October 6, 1964

New Zealand mathematician (1895-1967) | honorary doctor of the University of New Zealand (1943), Fellow of the Royal Society of Literature (1964), Gunning

Polish chemist and soldier | Decade of Independence Regained, Victory Medal, Silver Cross of Merit, War Medal 1918-1921 | Warsaw University of Technology

German physicist (1887-1971) | Hervorragender Wissenschaftler des Volkes (1962), Patriotic Order of Merit in Bronze | Technical University of Munich, TU Dresden

Hungarian physicist (1887-1943) | Eötvös Loránd University, University of Göttingen | Budapest: April 1, 1887 - Budapest: December 23, 1943 | Béla Pogány

Dutch biochemist (1884-1962) | doctor honoris causa from the University of Paris (1950) | Utrecht University, University of Amsterdam | Zwolle: April 1, 1884

Polish mathematician | Commander of the Order of Polonia Restituta, Decade of Independence Regained | University of Göttingen, Jagiellonian University

American film producer | Illinois: April 1, 1878 - California: October 4, 1940 | Joseph Menchen | Illinois: April 1, 1878 - California: October 4, 1940

Peruvian painter (1875-1957) | Cajamarca Department: April 1, 1875 - Cajamarca: June 12, 1957 | Mario Urteaga Alvarado | Cajamarca Department: April 1, 1875

French writer (1874–1936) | Prix d'éloquence (1896) | Lycée Henri-IV | Tournus: April 1, 1874 - Geneva: April 16, 1936 | Albert Thibaudet | Tournus: April

English mathematician and clergyman (1874–1953) | Smith's Prize (1898), Fellow of the Royal Society (1909) | Barnes G-function, Barnes integral, Barnes zeta function

French politician (1872–1940) | Courrières: April 1, 1872 - Meudon: August 2, 1940 | Jules-Louis Breton | Courrières: April 1, 1872 - Meudon: August 2, 1940

Old University of Leuven | April 1, 1871 - Mexico City: January 22, 2019 | Idzi Benedykt Radziszewski | April 1, 1871 - Mexico City: January 22, 2019

French manufacturer (1870–1913) | Officer of the Legion of Honour (1909) | http://www.wikidata.org/.well-known/genid/b504654bd04aab359766183c11972734 | Le

Austrian chemist (1865-1929) | Nobel Prize in Chemistry (1925), Laura R. Leonard Prize (1923) | TU Wien, Ludwig-Maximilian-University in Munich, University of Vienna

Russian chemist (1860–1934) | Order of St. Vladimir, 3rd class | Kazan Federal University | Borisoglebskoye: April 1, 1860 - Moscow: July 28, 1934 | Sergey

Italian political scientist and journalist (1858–1941) | Order of Saints Maurice and Lazarus | University of Palermo | Palermo: April 1, 1858 - Rome: November 8, 1941

French physicist (1857-1899) | Lycée Saint-Louis, École polytechnique | Thônes: April 1, 1857 - Tournon-sur-Rhône: November 25, 1899 | Aimé Vaschy (Aime

German teacher and mathematician | Opole: April 1, 1851 - Ohrdruf: February 14, 1925 | Paul Victor Langer | Opole: April 1, 1851 - Ohrdruf: February 14, 1925

German chemist (1850–1902) | University of Greifswald | Nuremberg: April 1, 1850 - Tübingen: April 19, 1902 | Hans von Pechmann | Nuremberg: April 1, 1850

Médaille militaire | April 1, 1848 - Tartu: September 27, 1852 | Maurice Gallay | April 1, 1848 - Tartu: September 27, 1852 | Médaille militaire

April 1, 1847 - Burgwerben: April 29, 1801 | G.J. Legebeke | April 1, 1847 - Burgwerben: April 29, 1801

epizootologist | Order of Saint Stanislaus, 2nd class (1881), Order of St. Vladimir, 4th class, Order of Saint Anna, 2nd class (1885) | Imperial Academy of

Swiss chemist (1837-1919) | University of Basel | Basel: April 1, 1837 - Basel: October 14, 1919 | Friedrich Goppelsroeder | Basel: April 1, 1837 - Basel

French engineer | Officer of the Legion of Honour | École polytechnique, Mines ParisTech | Strasbourg: April 1, 1837 - Paris: September 7, 1889 | Edmond Fuchs

German chemist (1828–1902) | Frankfurt (Oder): April 1, 1828 - Leipzig: May 15, 1902 | Rudolf Arendt | Frankfurt (Oder): April 1, 1828 - Leipzig: May 15, 1902

inventor and potter (1818-1899) | Staffordshire: April 1, 1818 - June 16, 1899 | Thomas Maddock | Staffordshire: April 1, 1818 - June 16, 1899

Hungarian lawyer, poet, critic, esthete, collector of folk poetry a educator (1814–1868) | Veľké Kapušany: April 1, 1814 - Sárospatak: January 23, 1868

German chemist and university teacher (1813-1899) | Humboldt University of Berlin | Berlin: April 1, 1813 - Groß-Lichterfelde: December 28, 1899 | Carl

British philosopher (1811–1894) | University of Glasgow, University of Edinburgh | Ayrshire: April 1, 1811 - Princeton: November 16, 1894 | James McCosh

British mathematician (1801–1898) | April 1, 1801 - June 6, 1898 | Henry Perigal | April 1, 1801 - June 6, 1898

Polish mathematician | Krzemieniec Lyceum, Jagiellonian University | Warsaw: April 1, 1791 - Kraków: April 2, 1838 | Franciszek Sapalski | Warsaw: April 1

French mathematician, physicist, and philosopher (1776-1831) | Grand prix des sciences mathématiques (1815) | Sophie Germain prime, Sophie Germain's theorem

German forester | Schleswig: April 1, 1772 - May 13, 1858 | Christian Peter Laurop | Schleswig: April 1, 1772 - May 13, 1858

Savoyard philosopher, writer, lawyer, and diplomat (1753-1821) | University of Turin | Chambéry: April 1, 1753 - Turin: February 26, 1821 | Joseph de Maistre

historian and philosopher (1750-1812) | Order of the White Eagle, Order of Saint Stanislaus | Jagiellonian University | Velyki Dederkaly: April 1, 1750

Swiss mathematician (1742-1780) | Zurich: April 1, 1742 - Zurich: May 27, 1780 | Johann Heinrich Waser | Zurich: April 1, 1742 - Zurich: May 27, 1780

Dutch physicist | Rotterdam: April 1, 1698 - Rotterdam: July 3, 1788 | Steven Hoogendijk | Rotterdam: April 1, 1698 - Rotterdam: July 3, 1788

Danish mathematician | Mohr–Mascheroni theorem | Copenhagen: April 1, 1640 - Sławnikowice: January 26, 1697 | Georg Mohr - Jørgen Mohrendal | Copenhagen

Bishop of Salisbury, mathematician and astronomer | Sidney Sussex College | Aspenden: April 1, 1617 - London: January 6, 1689 | Seth Ward | Aspenden: April 1

French soldier, hedonist, essayist and literary critic | Lycée Louis-le-Grand, University of Caen Normandy, Lycée Saint-Louis | Saint-Denis-le-Gast: April 1

French noblewoman (1554–1631) | Mouchamps: April 1, 1554 - Mouchamps: October 26, 1631 | Catherine de Parthenay | Mouchamps: April 1, 1554 - Mouchamps

German mathematician | Rain: April 1, 1482 - Innsbruck: April 15, 1535 | Georg Tannstetter | Rain: April 1, 1482 - Innsbruck: April 15, 1535