Wikipedia:WikiProject Mathematics/List of mathematicians (O)

O

 * O'Brien, Matthew (Ireland, 1814–1855)
 * O'Connell, Neil (Ireland, ?–?)
 * O'Dorney, Evan (USA, born 1993)
 * O'Hara, Jun (Japan, born 1963)
 * O'Keefe, Christine (Australia, ?–?)
 * O'Leary, Dianne P. (?, born 1951)
 * O'Malley, Robert Edmund (USA, born 1939)
 * O'Meara, O. Timothy (USA, 1928–2018)
 * O'Nan, Michael (USA, 1943–2017)
 * O'Neill, Barrett (USA, 1924–2011)
 * O'Shea, Donal (Canada, ?–?)
 * Obádovics, Gyula J. (Hungary, born 1927)
 * Oberschelp, Arnold (Germany, born 1932)
 * Obi, Chike (Nigeria, 1921–2008)
 * Obreshkov, Nikola (Bulgaria, 1896–1963)
 * d'Ocagne, Philbert Maurice (France, 1862–1938)
 * Ockendon, Hilary (Britain, ?–?)
 * Ockendon, John (Britain, born 1940s)
 * Ocone, Daniel (USA, ?–?)
 * Oda, Tadao (Japan, born 1940)
 * Oddi, Muzio (Italy, 1569–1639)
 * Odlyzko, Andrew (USA, born 1949)
 * Oellermann, Ortrud (Canada/South Africa, ?–?)
 * Oenopides (Ancient Greece, born 490s BC)
 * Oesterlé, Joseph (France, born 1954)
 * Offord, Cyril (?, 1906–2000)
 * Ofman, Yuri Petrovich (Russia, born 1939)
 * Ogden, Raymond (Britain, ?–?)
 * Ogg, Andrew (USA, born 1934)
 * Oggier, Frédérique (Switzerland/Singapore, ?–?)

Ogi

 * Ogilvy, C. Stanley (USA, 1913–2000)
 * Ognjanović, Srđan (Serbia, ?–?)
 * Ogura, Kinnosuke (Japan, ?–?)
 * Ogus, Arthur (USA, ?–?)
 * Oh, Hee (South Korea, born 1969)
 * Oh, Yong-Geun (South Korea, born 1961)
 * Ohm, Martin (Germany, 1792–1872)
 * Ohya, Masanori (Japan, born 1947)
 * Oja, Eve (Estonia, ?–?)
 * Oka, Kiyoshi (Japan, 1901–1978)
 * Okamoto, Hisashi (?, born 1956)
 * Okamura, Hiroshi (Japan, 1905–1948)
 * Okikiolu, Kathleen Adebola (Britain, born 1965)
 * Okounkov, Andrei (Russia, born 1969)
 * Øksendal, Bernt (Norway, born 1945)
 * Oldroyd, James G. (Britain, 1921–1982)
 * Olds, Carl D. (New Zealand, 1912–1979)
 * Olearius, Adam (Germany, 1603–1671)
 * Olech, Czesław (Poland, 1931–2015)
 * Oleinik, Olga (Soviet Union, 1925–2001)
 * Olesen, Dorte (Denmark, born 1948)
 * Olevskii, Alexander Moiseevich (Soviet Union/Israel, born 1939)
 * Olive, David (?, 1937–2012)
 * Olive, Gloria (New Zealand, 1923–2006)
 * de Oliveira, Adriana Neumann (Brazil, ?–?)
 * Olivier, Théodore (?, 1793–1853)
 * Oliynyk, Todd (Australia, ?–?)
 * Olkin, Ingram (USA, 1924–2016)
 * Ollerenshaw, Kathleen (Britain, 1912–2014)
 * Olney, Grant (USA, born 1983)
 * Olshansky, Aleksandr (Soviet Union/Russia, born 1946)

Olu

 * Olubummo, Adegoke (Nigeria, ?–?)
 * Olubummo, Yewande (Nigeria, ?–?)
 * Olum, Paul (USA, 1918–2001)
 * Olunloyo, Victor Omololu (Nigeria, born 1935)
 * Olver, Frank W. J. (USA, 1924–2013)
 * Olver, Peter J. (USA, born 1952)
 * Onicescu, Octav (Romania, 1892–1983)
 * Onishchik, Arkady Lvovich (Russia, 1933–2019)
 * Ono, Ken (USA, born 1968)
 * Ono, Takashi (?, born 1928)
 * Onumanyi, Peter (Nigeria, ?–?)
 * Onuş, Melih (Turkey, ?–?)
 * Oommen, John (India, born 1953)
 * Oort, Frans (?, born 1935)
 * Opelt, Friedrich Wilhelm (Germany, 1794–1863)
 * Oppenheim, Alexander (Britain, 1903–1997)
 * Oppermann, Ludvig (Denmark, 1817–1883)
 * Oppitz, Volker (Germany, born 1931)
 * von Oppolzer, Theodor (Austria, 1841–1886)
 * Ore, Øystein (Norway, 1899–1968)
 * Oren, Menachem (Israel, 1903–1962)
 * Oresme, Nicole (Medieval France, 1320s–1382)
 * Orlando, Luciano (Italy, 1887–1915)
 * Orlicz, Władysław (Poland, 1903–1990)
 * Orlik, Peter (?, born 1938)
 * Orlov, Dmitri Olegovich (Soviet Union, born 1966)
 * Orno, Peter (USA, ?–?)
 * Ornstein, Donald Samuel (USA, born 1934)
 * Ornstein, Leonard (?, 1880–1941)
 * Orr, William McFadden (Ireland, 1866–1934)
 * Orrell, David (Canada, born 1962)

Ors

 * Orshansky, Mollie (?, 1915–2006)
 * Orszag, Steven (USA, 1943–2011)
 * de Ortega, Juan (mathematician) (Spain, ?–?)
 * Ortlieb, Claus Peter (?, 1947–2019)
 * Osborn, John E. (USA, 1936–2011)
 * Osgood, William Fogg (USA, 1864–1943)
 * Osher, Stanley (USA, born 1942)
 * Osin, Denis (?, ?–?)
 * Osinga, Hinke (Netherlands/New Zealand, born 1969)
 * Osipov, Yury (Russia/Soviet Union, born 1936)
 * Osipovsky, Timofei (Russia, 1766–1832)
 * Osofsky, Barbara L. (?, ?–?)
 * Osserman, Robert (USA, 1926–2011)
 * Ossiander, Mina (?, ?–?)
 * Ossona de Mendez, Patrice (France, born 1966)
 * Osterwalder, Konrad (Switzerland, born 1942)
 * Osthus, Deryk (?, ?–?)
 * Ostrogradsky, Mikhail (Ukraine/Imperial Russia, 1801–1862)
 * Ostrovskii, Iossif (Soviet Union, 1934–2020)
 * Ostrowski, Alexander (Ukraine, 1893–1986)
 * Otho, Valentinus (Germany, ?–1603)
 * Ott, Edward (?, ?–?)
 * D'Ottaviano, Itala (Brazil, born 1944)
 * Ottlik, Géza (Hungary, 1912–1990)
 * Otto, Felix (Germany, born 1966)
 * van Oudenaarden, Alexander (?, born 1970)
 * Ouedraogo, Marie Françoise (?, born 1967)
 * Oughtred, William (England, 1575–1660)
 * Oum, Sang-il (South Korea, born 1976)
 * Overbeek, Ross (USA, born 1949)

Ovi

 * D'Ovidio, Enrico (?, ?–?)
 * Owen, Guillermo (Colombia, born 1938)
 * Owen, Henry (Wales, 1716–1795)
 * Owens, Helen Brewster (?, 1881–1968)
 * Owens, Robyn (Australia, ?–?)
 * Oxley, James (Australia, ?–?)
 * Oxtoby, John C. (?, 1910–1991)
 * Oystaeyen, Fred Van (Belgium, born 1947)
 * Ozanam, Jacques (France, 1640–1718)
 * Ozawa, Narutaka (?, born 1974)
 * Ozsváth, Peter (Hungary, born 1967)