René Maurice Fréchet
René Maurice Fréchet (French: [ʁəne mɔʁis fʁeʃɛ, moʁ-]; 2 September 1878 – 4 June 1973) was a French mathematician. He made major contributions to general topology and was the first to define metric s
Isaac Namioka
Isaac Namioka (April 25, 1928 - September 25, 2019) was a Japanese-American mathematician who worked in general topology and functional analysis. He was a professor emeritus of mathematics at the Univ
Vitold Shmulyan
Vitold Lvovich Shmulyan (Russian: Витольд Львович Шмульян, 29 August 1914 – 27 August 1944) was a Soviet mathematician known for his work in functional analysis. The Eberlein–Šmulian theorem and Krein
Theophil Henry Hildebrandt
Theophil Henry Hildebrandt (24 July 1888 – 9 October 1980) was an American mathematician who did research on functional analysis and integration theory. Hildebrandt was born in Dover, Ohio, graduated
Hans Rådström
Hans Vilhem Rådström (1919–1970) was a Swedish mathematician who worked on complex analysis, continuous groups, convex sets, set-valued analysis, and game theory. From 1952, he was lektor (assistant p
Günter Lumer
Günter Lumer (1929–2005) was a mathematician known for his work in functional analysis. He is the namesake of the Lumer–Phillips theorem on semigroups of operators on Banach spaces, and was the first
Israel Gelfand
Israel Moiseevich Gelfand, also written Israïl Moyseyovich Gel'fand, or Izrail M. Gelfand (Yiddish: ישראל געלפֿאַנד, Russian: Изра́иль Моисе́евич Гельфа́нд, Ukrainian: Ізраїль Мойсейович Гельфанд; 2 S
Nicole Tomczak-Jaegermann
Nicole Tomczak-Jaegermann FRSC (8 June 1945 – 17 June 2022) was a Polish-Canadian mathematician, a professor of mathematics at the University of Alberta, and the holder of the Canada Research Chair in
Marcel Riesz
Marcel Riesz (Hungarian: Riesz Marcell [ˈriːs ˈmɒrt͡sɛll]; 16 November 1886 – 4 September 1969) was a Hungarian mathematician, known for work on summation methods, potential theory, and other parts of
Frank Forelli
Frank John Forelli, Jr. (8 April 1932, San Diego – 5 September 1994, Madison, Wisconsin) was an American mathematician, specializing in the functional analysis of holomorphic functions. Forelli receiv
Charles Earl Rickart
Charles Earl Rickart (1913 – 17 April 2002) was an American mathematician, known for Rickart spaces. Rickart was born in Osage City, Kansas, and earned his B.A. and M.A. from the University of Kansas.
Frigyes Riesz
Frigyes Riesz (Hungarian: Riesz Frigyes, pronounced [ˈriːs ˈfriɟɛʃ], sometimes spelled as Frederic; 22 January 1880 – 28 February 1956) was a Hungarian mathematician who made fundamental contributions
Abraham Wald
Abraham Wald (/wɔːld/; Hungarian: Wald Ábrahám, Yiddish: אברהם וואַלד; 31 October 1902 – 13 December 1950) was a Jewish Hungarian mathematician who contributed to decision theory, geometry, and econom
Harold S. Shapiro
Harold Seymour Shapiro (2 April 1928 – 5 March 2021) was a professor of mathematics at the Royal Institute of Technology in Stockholm, Sweden, best known for inventing the so-called Shapiro polynomial
Henri Lebesgue
Henri Léon Lebesgue ForMemRS (French: [ɑ̃ʁi leɔ̃ ləbɛɡ]; June 28, 1875 – July 26, 1941) was a French mathematician known for his theory of integration, which was a generalization of the 17th-century c
Alexander Grothendieck
Alexander Grothendieck (/ˈɡroʊtəndiːk/; German pronunciation: [ˌalɛˈksandɐ ˈɡʁoːtn̩ˌdiːk]; French: [ɡʁɔtɛndik]; 28 March 1928 – 13 November 2014) was a stateless mathematician who became the leading f
Joseph L. Taylor
Joseph Lawrence Taylor (7 April 1941 - 28 July 2016) was an American mathematician, specializing in Banach algebras and non-commutative harmonic analysis.
Luigi Fantappiè
Luigi Fantappiè (15 September 1901 – 28 July 1956) was an Italian mathematician, known for work in mathematical analysis and for creating the theory of analytic functionals: he was a student and follo
Robert G. Bartle
Robert Gardner Bartle (November 20, 1927 – September 18, 2003) was an American mathematician specializing in real analysis. He is known for writing the popular textbooks The Elements of Real Analysis
Antoni Zygmund
Antoni Zygmund (December 25, 1900 – May 30, 1992) was a Polish mathematician. He worked mostly in the area of mathematical analysis, including especially harmonic analysis, and he is considered one of
Mark Naimark
Mark Aronovich Naimark (Russian: Марк Ароно́вич Наймарк) (5 December 1909 – 30 December 1978) was a Soviet mathematician who made important contributions to functional analysis and mathematical physic
Samuel Karlin
Samuel Karlin (June 8, 1924 – December 18, 2007) was an American mathematician at Stanford University in the late 20th century.
Kōsaku Yosida
Kōsaku Yosida (吉田 耕作, Yosida Kōsaku, 7 February 1909, Hiroshima – 20 June 1990) was a Japanese mathematician who worked in the field of functional analysis. He is known for the Hille-Yosida theorem co
Joaquín Bustoz Jr.
Joaquín Bustoz Jr. (1939–2003) was an American mathematician who worked as a professor of mathematics at Arizona State University. His mathematical research concerned functional analysis, including or
Hans Freudenthal
Hans Freudenthal (17 September 1905 – 13 October 1990) was a Jewish-German-born Dutch mathematician. He made substantial contributions to algebraic topology and also took an interest in literature, ph
Otto Toeplitz
Otto Toeplitz (1 August 1881 – 15 February 1940) was a German mathematician working in functional analysis.
Mikhail Kadets
Mikhail Iosiphovich Kadets (Russian: Михаил Иосифович Кадец, Ukrainian: Михайло Йосипович Кадець, sometimes transliterated as Kadec, 30 November 1923 – 7 March 2011) was a Soviet-born Jewish mathemati
Stanisław Mazur
Stanisław Mieczysław Mazur (1 January 1905, Lwów – 5 November 1981, Warsaw) was a Polish mathematician and a member of the Polish Academy of Sciences. Mazur made important contributions to geometrical
Peter Orno
Beginning in 1974, the fictitious Peter Orno (alternatively, Peter Ørno, P. Ørno, and P. Orno) appeared as the author of research papers in mathematics. According to Robert Phelps, the name "P. Orno"
Joram Lindenstrauss
Joram Lindenstrauss (Hebrew: יורם לינדנשטראוס) (October 28, 1936 – April 29, 2012) was an Israeli mathematician working in functional analysis. He was a professor of mathematics at the Einstein Instit
Pia Nalli
Pia Maria Nalli (10 February 1886 – 27 September 1964) was an Italian mathematician known for her work on the summability of Fourier series, on Morera's theorem for analytic functions of several varia
John von Neumann
John von Neumann (/vɒn ˈnɔɪmən/; Hungarian: Neumann János Lajos, pronounced [ˈnɒjmɒn ˈjaːnoʃ ˈlɒjoʃ]; December 28, 1903 – February 8, 1957) was a Hungarian-American mathematician, physicist, computer
Errett Bishop
Errett Albert Bishop (July 14, 1928 – April 14, 1983) was an American mathematician known for his work on analysis. He expanded constructive analysis in his 1967 Foundations of Constructive Analysis,
Alexander Ostrowski
Alexander Markowich Ostrowski (Ukrainian: Олександр Маркович Островський; Russian: Алекса́ндр Ма́ркович Остро́вский; 25 September 1893, in Kiev, Russian Empire – 20 November 1986, in Montagnola, Lugan
Georgiy Shilov
Georgi Evgen'evich Shilov (Russian: Гео́ргий Евге́ньевич Ши́лов; 3 February 1917 – 17 January 1975) was a Soviet mathematician and expert in the field of functional analysis, who contributed to the th
Jean Bourgain
Jean, Baron Bourgain (French: [buʁɡɛ̃]; 28 February 1954 – 22 December 2018) was a Belgian mathematician. He was awarded the Fields Medal in 1994 in recognition of his work on several core topics of m
Mark Krein
Mark Grigorievich Krein (Ukrainian: Марко́ Григо́рович Крейн, Russian: Марк Григо́рьевич Крейн; 3 April 1907 – 17 October 1989) was a Soviet mathematician, one of the major figures of the Soviet schoo
Helmut H. Schaefer
Helmut Heinrich Schaefer (February 14, 1925 in Grossenhain, Germany – December 16, 2005 in Tübingen, Germany) was a German mathematician at home on both sides of the Atlantic. His work centered on fun
Paul Halmos
Paul Richard Halmos (Hungarian: Halmos Pál; March 3, 1916 – October 2, 2006) was a Hungarian-born American mathematician and statistician who made fundamental advances in the areas of mathematical log
Igor Kluvánek
Igor Kluvánek (27 January 1931 – 24 July 1993) was a Slovak-Australian mathematician.
Leonidas Alaoglu
Leonidas (Leon) Alaoglu (Greek: Λεωνίδας Αλάογλου; March 19, 1914 – August 1981) was a mathematician, known for his result, called Alaoglu's theorem on the weak-star compactness of the closed unit bal
Erwin Kreyszig
Erwin Otto Kreyszig (January 6, 1922 in Pirna, Germany – December 12, 2008) was a German Canadian applied mathematician and the Professor of Mathematics at Carleton University in Ottawa, Ontario, Cana
Naum Akhiezer
Naum Ilyich Akhiezer (Ukrainian: Нау́м Іллі́ч Ахіє́зер; Russian: Нау́м Ильи́ч Ахие́зер; 6 March 1901 – 3 June 1980) was a Soviet and Ukrainian mathematician of Jewish origin, known for his works in ap
Wilhelmus Luxemburg
Wilhelmus Anthonius Josephus Luxemburg (Delft, 11 April 1929 – 2 October 2018) was a Dutch American mathematician who was a professor of mathematics at the California Institute of Technology. He recei
Charles Read (mathematician)
Charles John Read (16 February 1958 – 14 August 2015) was a British mathematician known for his work in functional analysis. In operator theory, he is best known for his work in the 1980s on the invar
Zbigniew Ciesielski
Zbigniew Ciesielski (1 October 1934 – 5 October 2020) was a Polish mathematician, specializing in functional analysis and probability theory. Ciesielski was born in Gdynia, Poland. He received in 1960
Eve Oja
Eve Oja (10 October 1948 – 27 January 2019) was an Estonian mathematician specializing in functional analysis. She was a professor at the University of Tartu.
Felix Browder
Felix Earl Browder (/ˈbraʊdər/; July 31, 1927 – December 10, 2016) was an American mathematician known for his work in nonlinear functional analysis. He received the National Medal of Science in 1999
George Maltese
George John Maltese (June 24, 1931 in Middletown, Connecticut – October 23, 2009 in Middletown, Connecticut) was an American mathematician whose primary field of research was functional analysis.
John Rainwater
The fictitious mathematician John Rainwater was created as a student prank but has become known as the author of important results in functional analysis. At the University of Washington in 1952, John
Evelyn Silvia
Evelyn Marie Silvia (February 8, 1948 – January 21, 2006) was an American mathematician specializing in functional analysis and particularly in starlike functions. She was a professor at the Universit
Elena Moldovan Popoviciu
Elena Moldovan Popoviciu (26 August 1924–24 June 2009) was a Romanian mathematician known for her work in functional analysis and specializing in generalizations of the concept of a convex function. S
Robert Phelps
Robert Ralph Phelps (March 22, 1926 – January 4, 2013) was an American mathematician who was known for his contributions to analysis, particularly to functional analysis and measure theory. He was a p
Vito Volterra
Vito Volterra KBE FRS(For) HFRSE (/voʊlˈtɛrə/, Italian: [ˈviːto volˈtɛrra]; 3 May 1860 – 11 October 1940) was an Italian mathematician and physicist, known for his contributions to mathematical biolog
Aryeh Dvoretzky
Aryeh (Arie) Dvoretzky (Hebrew: אריה דבורצקי, Russian: Арье Дворецкий; May 3, 1916 – May 8, 2008) was a Russian-born Israeli mathematician, the winner of the 1973 Israel Prize in Mathematics. He is be
Eberhard Zeidler (mathematician)
Eberhard Hermann Erich Zeidler (6 October 1940 in Leipzig, Germany – 18 November 2016 ibid) was a German mathematician, who worked primarily in the field of non-linear functional analysis.
Nigel Kalton
Nigel John Kalton (June 20, 1946 – August 31, 2010) was a British-American mathematician, known for his contributions to functional analysis.
Renato Caccioppoli
Renato Caccioppoli (Italian: [reˈnaːto katˈtʃɔppoli]; 20 January 1904 – 8 May 1959) was an Italian mathematician, known for his contributions to mathematical analysis, including the theory of function
Sergei Fomin
Sergei Vasilyevich Fomin (Russian: Серге́й Васи́льевич Фоми́н; 9 December 1917 – 17 August 1975) was a Soviet mathematician who was co-author with Andrey Kolmogorov of Introductory real analysis, and
Władysław Orlicz
Władysław Roman Orlicz (May 24, 1903 in Okocim, Austria-Hungary (now Poland) – August 9, 1990 in Poznań, Poland) was a Polish mathematician of Lwów School of Mathematics. His main interests were funct
Leonid Kantorovich
Leonid Vitalyevich Kantorovich (Russian: Леони́д Вита́льевич Канторо́вич, IPA: [lʲɪɐˈnʲit vʲɪˈtalʲjɪvʲɪtɕ kəntɐˈrovʲɪtɕ]; 19 January 1912 – 7 April 1986) was a Soviet mathematician and economist, know
Stanisław Saks
Stanisław Saks (30 December 1897 – 23 November 1942) was a Polish mathematician and university tutor, a member of the Lwów School of Mathematics, known primarily for his membership in the Scottish Caf
Gottfried Köthe
Gottfried Maria Hugo Köthe (born 25 December 1905 in Graz; died 30 April 1989 in Frankfurt) was an Austrian mathematician working in abstract algebra and functional analysis.
Richard Friederich Arens
Richard Friederich Arens (24 April 1919 – 3 May 2000) was an American mathematician. He was born in Iserlohn, Germany. He emigrated to the United States in 1925. Arens received his Ph.D. in 1945 from
Adriaan Cornelis Zaanen
Adriaan Cornelis "Aad" Zaanen (14 June 1913 in Rotterdam – 1 April 2003 in Wassenaar) was a Dutch mathematician working in analysis. He is known for his books on Riesz spaces (together with Wim Luxemb
Charalambos D. Aliprantis
Charalambos Dionisios Aliprantis (Greek: Χαράλαμπος Διονύσιος Αλιπράντης; May 12, 1946 – February 27, 2009) was a Greek-American economist and mathematician who introduced Banach space and Riesz space
Albert Wilansky
Albert "Tommy" Wilansky (13 September 1921, St Johns, Newfoundland – 3 July 2017, Bethlehem, Pennsylvania) was a Canadian-American mathematician, known for introducing Smith numbers.
Claude Ambrose Rogers
Claude Ambrose Rogers FRS (1 November 1920 – 5 December 2005) was an English mathematician who worked in analysis and geometry.
David Milman
David Pinhusovich Milman (Russian: Дави́д Пи́нхусович Ми́льман; 15 January 1912, Chechelnyk near Vinnytsia – 12 July 1982, Tel Aviv) was a Soviet and later Israeli mathematician specializing in functi
Johann Radon
Johann Karl August Radon (/ˈreɪ.dɑːn/; 16 December 1887 – 25 May 1956) was an Austrian mathematician. His doctoral dissertation was on the calculus of variations (in 1910, at the University of Vienna)
Robert C. James
Robert Clarke James (1918 – September 25, 2004) was an American mathematician who worked in functional analysis.
Walter Rudin
Walter Rudin (May 2, 1921 – May 20, 2010) was an Austrian-American mathematician and professor of Mathematics at the University of Wisconsin–Madison. In addition to his contributions to complex and ha