Italian mathematician (1984-) | Gili Agostinelli Prize (2019), EMS Prize (2012), Cours Peccot (2011), Feltrinelli Prize (2017), honorary doctor of the

French novelist and philosopher | Chevalier des Arts et des Lettres, Prix Femina (2009), resident at the Villa Medici | Trinity College, Paris-Sorbonne

Spanish linguist (1969-2012) | Saint George's Cross (2012) | Autonomous University of Barcelona, Pompeu Fabra University | Barcelona: April 2, 1969 - Manaslu

Japanese mathematician | Merton College, Sophia University, Princeton University | Tokyo: April 2, 1968 - January 1, 2012 | Tadashi Tokieda | Tokyo: April 2

Slovenian philosopher | Stritar Award (2000) | Slovenj Gradec: April 2, 1968 - Washington, D.C.: December 22, 1991 | Ignacija Fridl Jarc | Slovenj Gradec

American mathematician | ACM Fellow (2013), Fellow of the Society for Industrial and Applied Mathematics (2016), Frederick W. Lanchester Prize (2013)

German ornithologist | University of Tübingen | Radolfzell am Bodensee: April 2, 1966 - Essen: June 5, 2013 | Wolfgang Fiedler | Radolfzell am Bodensee: April

Puerto Rican scientist (born 1963) | Georgetown University | San Juan: April 2, 1963 - Boston: January 1, 1947 | Miriam Rodon Naveira | San Juan: April 2, 1963

Finnish mathematician | Gustave Chaix d'Est-Ange Prize (2012), Knight of the French Order of Academic Palms (2004) | University of Jyväskylä | Mikkeli: April

Danylo Halytsky Lviv National Medical University | April 2, 1957 - Kyiv: April 3, 2021 | Roman Lekan | April 2, 1957 - Kyiv: April 3, 2021 | Danylo Halytsky

German mathematician and historian of mathematics | Martin Luther University Halle-Wittenberg | Halle (Saale): April 2, 1953 - Merimbula: October 14, 2021

Russian scientist | Military Institute of Engineering Forces of the Armed Forces Academy | Novosibirsk: April 2, 1952 - Yerevan: May 14, 1978 | Aleksandr

academic | Shanti Swarup Bhatnagar Prize for Science and Technology (1995) | April 2, 1951 - Ontinyent: November 12, 1930 | Anil Kumar Tyagi | April 2, 1951

Greek mathematician | honorary degree | University of California, Berkeley | Pellana: April 2, 1951 - Madrid: February 18, 1934 | Themistocles M. Rassias

Taiwanese businessman | Officer of the Order of the British Empire | Imperial College London | April 2, 1951 - Haverford: February 11, 2008 | Winston Wong

American audio engineer and inventor | Technical Grammy Award | University of California, Berkeley | San Francisco: April 2, 1950 - Detroit: May 31, 2022

Russian scientist | Order "For Merit to the Fatherland", 2nd class, Medal of the Order "For Merit to the Fatherland", 2nd class | Siberian State Industrial University

Japanese chemist | Kobe: April 2, 1947 - Budapest: September 26, 1976 | Masaaki Suzuki | Kobe: April 2, 1947 - Budapest: September 26, 1976

Finnish linguist, pioneer in Finnish speech synthesis and speech technology | IEEE Fellow | Tampere University of Technology | Hankasalmi: April 2, 1946

Indian nuclear physicist (born 1942) | Padma Bhushan in science & engineering, TWAS fellow | University of Mumbai, University of Madras | Tamil Nadu: April 2

American complexity theorist | ACM Fellow (1998) | Pennsylvania State University | New York City: April 2, 1941 - January 22, 2021 | Alan Louis Selman | New

Polish political activist (1941–2024) | Cross of Freedom and Solidarity (2015), Officer of the Order of Polonia Restituta (2006) | University of Łódź

Historian of science | Moscow State University Faculty of Geology, Moscow State University | Aldan: April 2, 1939 - London: September 6, 1988 | Valentin

Spanish civil engineer | honorary degree (1994), Medal of the Royal Spanish Society of Physics (2005), Miguel Catalán Prize (2012), Ramon Llull Award

Russian scientist | State Prize of the Russian Federation, Medal of the Order "For Merit to the Fatherland", 2nd class | MSU Faculty of Mechanics and Mathematics

Indian inventor and chemist (born 1935) | Padma Shri in science & engineering, Padma Bhushan in science & engineering, Om Prakash Bhasin Award (1994), TWAS fellow

American mathematician | Fields medal (1966), Bôcher Memorial Prize (1964), National Medal of Science (1967), Guggenheim Fellowship (1969) | forcing

Romanian engineer | Politehnica University of Bucharest, Carol I National College | Câmpina: April 2, 1933 - Helsinki: April 13, 1894 | Titu-Marius Băjenescu

Romanian chemist | Herman Skolnik Award (1994) | Politehnica University of Bucharest | Timișoara: April 2, 1931 - August 6, 1846 | Alexandru Balaban

Soviet and Israeli mathematician | State Prize of Ukraine in Science and Technology (1992) | Faculty of Physics of the Lviv University, Lviv University | Kyiv

American mathematician | Doctor of Humane Letters | Brandeis University | Boston: April 2, 1929 - May 27, 2020 | Herbert Gross | Boston: April 2, 1929 - May

Swedich-American mathematician | City College of New York, Massachusetts Institute of Technology | Brooklyn: April 2, 1928 - Stockholm: March 5, 2021 | Harold

American chemist (1928–2021) | James T. Grady-James H. Stack Award for Interpreting Chemistry (2005) | New York City: April 2, 1928 - Pittsburgh: August 29, 2021

French scientist (1923-2004) | Paris Law Faculty, École Centrale Paris, Sorbonne | Châteauroux: April 2, 1923 - Paris: September 27, 2004 | Michel Batisse

Welsh chemist, academic, and academic administrator (1920-1989) | Commander of the Order of the British Empire | April 2, 1920 - April 19, 1989 | C. W. L.

Italian-Israeli physicist | Milan: April 2, 1917 - Haifa: February 10, 2012 | Arrigo Finzi | Milan: April 2, 1917 - Haifa: February 10, 2012

American nuclear physicist (1915–1960) | Chicago: April 2, 1915 - April 12, 1960 | Donald J. Hughes | Chicago: April 2, 1915 - April 12, 1960

French sailor (1910–2000) | Clermont-Ferrand: April 2, 1910 - Redon: February 1, 2000 | Marcel Bardiaux | Clermont-Ferrand: April 2, 1910 - Redon: February 1, 2000

German nuclear physicist (1909–1998) | Otto-Hahn Prize of the City of Frankfurt am Main (1980) | University of Tübingen, Technical University of Munich

Japanese mathematician (1906–2006) | Order of the Rising Sun, 2nd class (1976), Knight of the Legion of Honour (1980) | University of Hamburg, University of

Austrian physicist and priest (1905–1999) | Gloggnitz: April 2, 1905 - Melk: January 18, 1999 | Reginald Zupancic | Gloggnitz: April 2, 1905 - Melk: January 18, 1999

German mathematician | Leipzig University | Leipzig: April 2, 1901 - Mainz: April 30, 1990 | Ernst Hölder (Ernst Holder) | Leipzig: April 2, 1901 - Mainz

Chinese mathematician (1898-1940) | University of Göttingen | Xinjian District: April 2, 1898 - Xichang: October 1, 1940 | Zeng Jiongzhi | Xinjian District

Czech philosopher, publicist, translator, sociologist, university educator and science writer (1891–1945) | Order of Tomáš Garrigue Masaryk | Examination

Italian mathematical physicist and civil engineer (*1888 – †1963) | Grand Officer of the Order of Merit of the Italian Republic, commander of the Order of

American mathematician (1878–1955) | googol, googolplex, Kasner metric, midpoint polygon | Columbia University, City College of New York | New York City

April 2, 1877 - Essen: September 5, 1941 | Jean Bodson | April 2, 1877 - Essen: September 5, 1941

American biologist (1877–1940) | New York City: April 2, 1877 - Berkeley: October 31, 1940 | Carl Lucas Alsberg | New York City: April 2, 1877 - Berkeley

historian of literature (1875–1947) | Eötvös Loránd University | Budapest: April 2, 1875 - Budapest: November 9, 1947 | Ferenc Szinnyei | Budapest: April

American philosopher, diplomat, and educator (1862-1947) | doctor honoris causa from the University of Nancy, doctor honoris causa from the University of Paris

American inventor (1861–1933) | Grand Rapids: April 2, 1861 - Oakland: August 17, 1933 | Frank Edward McGurrin | Grand Rapids: April 2, 1861 - Oakland: August 17, 1933

Italian mathematician (1854-1933) | Novara: April 2, 1854 - Venice: June 16, 1933 | Giovanni Bordiga | Novara: April 2, 1854 - Venice: June 16, 1933

American inventor (1854-1936) | Akron: April 2, 1854 - Akron: September 19, 1936 | Frank Fowler Loomis | Akron: April 2, 1854 - Akron: September 19, 1936

French inventor and engineer | Commander of the Legion of Honour, Great Gold medal of the Société d'Encouragement au Progrès | Théâtrophone, Éole

Czech historian (1838–1915) | University of Vienna | Vamberk: April 2, 1838 - New Town: November 22, 1915 | Josef Kalousek | Vamberk: April 2, 1838 - New

Matheseos & Philosophiae naturalis Doctor Universiteit Utrecht 1855 | Utrecht University | Schiedam: April 2, 1828 - Rotterdam: April 19, 1895 | Thade van

French mathematician (1821-1883) | Paris: April 2, 1821 - Paris: February 28, 1883 | Louis-Adolphe Bertillon | Paris: April 2, 1821 - Paris: February 28, 1883

American businessman | Fellow of the American Academy of Arts and Sciences, National Inventors Hall of Fame (2006) | West Boylston: April 2, 1814 - Boston

April 2, 1810 - London: March 29, 1750 | Anthony Dumond Stanley | April 2, 1810 - London: March 29, 1750

Spanish pharmacist, politician and physicist (1806-1886) | Arenys de Mar: April 2, 1806 - Arenys de Mar: March 6, 1886 | Jaume Calbetó i Baralt (Jaume Calbeto

British scientist and businessman (1797-1877) | Royal Medal (1863), Bakerian Lecture (1858), Fellow of the Royal Society | London: April 2, 1797 - Ryde: August 15, 1877

19th-century British physician and scientist | King's College London, Royal Grammar School, University of Edinburgh | Longbenton: April 2, 1793 - Brighton: June 29, 1860

Italian philosopher (1770-1846) | Tropea: April 2, 1770 - Naples: December 13, 1846 | Pasquale Galluppi | Tropea: April 2, 1770 - Naples: December 13, 1846

Italian mathematician | Venice: April 2, 1763 - Venice: May 6, 1849 | Angelo Zendrini | Venice: April 2, 1763 - Venice: May 6, 1849

Polish painter, engraver | Corps of Cadets | Łany Małe: April 2, 1760 - Warsaw: July 15, 1825 | Józef Franciszek Łęski (Jozef Franciszek Leski) | Łany

English historian, philosopher, feminist (1731-1791) | Observations on a Pamphlet, Entitled, Thoughts on the Cause of the Present Discontents | Wye: April 2

British scientist and priest | Christ's College | April 2, 1638 - December 19, 1722 | John Covel | April 2, 1638 - December 19, 1722 | Christ's College

Italian physicist (1618-1663) | Physico-Mathesis de lumine, coloribus, et iride | University of Bologna, Ex chiesa e convento di Sant'Ignazio | Bologna: April

German mineralogist (1494-1555) | De Re Metallica, De Natura Fossilium, Bermannus; sive, de re metallica, De natura eorum quae effluunt ex terra, De ortu et

Italian Dominican saint (1347-1380) | Libro della divina dottrina | Siena: April 2, 1347 - Rome: May 7, 1380 | Catherine of Siena - Caterina di Jacopo di

Chinese scholar (1139-1192) | Jinxi County: April 2, 1139 - January 17, 1193 | Lu Jiuyuan | Jinxi County: April 2, 1139 - January 17, 1193