- Tabachnikov, Sergei (Russia, born 1956)
- Taber, Henry (USA, 1860–1936)
- Tabov, Yordan (Bulgaria, born 1946)
- Tachard, Guy (France, 1651–1712)
- Tacquet, André (Belgium, 1612–1660)
- Tadić, Marko (Croatia, born 1953)
- Tadmor, Eitan (Israel, born 1954)
- Taft, Earl (USA, 1931–2021)
- Tagore, Dwijendranath (?, 1840–1926)
- Taguchi, Genichi (Japan, 1924–2012)
- Tahan, Malba (Brazil, 1895–1974)
- Tahta, Dikran (Britain, 1928–2006)
- Taimanov, Iskander (Russia, born 1961)
- Taimiņa, Daina (Latvia, born 1954)
- Tait, Peter (Scotland, 1831–1901)
- Tait, William W. (US, born 1929)
- Takács, Lajos (Hungary, 1924–2015)
- Takagi, Teiji (Japan, 1875–1960)
- Takahashi, Daisuke (mathematician) (Japan, born 1970)
- Takakazu, Seki (Japan, 1642–1708)
- Takano, Kikuo (Japan, 1927–2006)
- Takens, Floris (Netherlands, 1940–2010)
- Takesaki, Masamichi (Japan, born 1933)
- Takeuti, Gaisi (Japan, 1926–2017)
- Takhtajan, Leon (Russia, born 1950)
- Takiff, Steven (US, ?–?)
- Takloo-Bighash, Ramin (Iran, born 1974)
- Talagrand, Michel (France, born 1952)
- Talamanca, Alessandro Figà (Italy, born 1938)
- Talbot, Walter Richard (?, 1909–1977)
- Taliaferro, R. Catesby (USA, 1907–1989)
- Tall, David (Britain, born 1941)
- Tam, Christopher K. W. (US, ?–?)
- Tamagawa, Tsuneo (Japanese American, 1925–2017)
- Tamari, Dov (Israel, 1911–2006)
- Tamarkin, Jacob (Russia/Soviet Union, 1888–1945)
- Tambs-Lyche, Ralph (Norway, 1890–1991)
- Tammer, Christiane (Germany, ?–?)
- Tanbay, Betül (Turkey, born 1960)
- Taniyama, Yutaka (Japan, 1927–1958)
- Tannaka, Tadao (Japan, 1908–1986)
- Tannenbaum, Allen (US, born 1953)
- Tannenbaum, Emmanuel David (Israel, 1978–2012)
- Tanner, Adam (Jesuit theologian) (Austria, 1572–1632)
- Tanner, Henry (Britain, 1851–1915)
- Tanner, Rosalind (Germany, 1900–1992)
- Tannery, Jules (France, 1848–1910)
- Tannery, Paul (France, 1843–1904)
- Tannstetter, Georg (Germany, 1482–1535)
- Tanton, James (?, born 1966)
- Tao, Tang (China, born 1963)
- Tao, Terence (Australia, born 1975)
- Tao, Zhan (China, born 1963)
- Taormina, Anne (Belgium/Britain, ?–?)
- Tapia, Richard A. (US, born 1939)
- Taqqu, Murad (Iraq, born 1942)
- Tarantello, Gabriella (Italy, born 1958)
- Tarasenko, Felix (Russia, 1932–2021)
- Tardos, Éva (Hungary, born 1957)
- Tardos, Gábor (Hungary, born 1964)
- ibn Ṭāriq, Yaʿqūb (Medieval Persia, ?–796)
- Tarjan, Robert (?, born 1948)
- Tarleton, Francis Alexander (Ireland, 1841–1920)
- Tarokh, Vahid (Iran, ?–?)
- Tarry, Gaston (France, 1843–1913)
- Tarski, Alfred (USA/Poland, 1901–1983)
- Tartaglia, Niccolò Fontana (Italy, 1499–1557)
- Tartar, Luc (USA/France, ?–?)
- Tat, Chong Chi (?, ?–?)
- Tătaru, Daniel (Romania, born 1967)
- Tate, John (US, 1925–2019)
- Tate, John (mathematician) (?, 1925–2019)
- Tate, Thomas (mathematician) (England, 1807–1888)
- Taton, René (France, 1915–2004)
- Taub, Abraham H. (US, 1911–1999)
- Tauber, Alfred (Slovakia/Hungary, 1866–1942)
- Taubes, Clifford (US, born 1954)
- Taunt, Derek (Britain, 1917–2004)
- Taurinus, Franz (Germany, 1794–1874)
- Taussky-Todd, Olga (US, 1906–1995)
- Tavares, John (Canada, born 1968)
- Tavares, Stafford (?, ?–?)
- Taylor, Alan D. (US, born 1947)
- Taylor, Angus Ellis (US, 1911–1999)
- Taylor, Brook (England, 1685–1731)
- Taylor, Eva Germaine Rimington (England, 1879–1966)
- Taylor, G. I. (England, 1886–1975)
- Taylor, Henry Martyn (England, 1842–1927)
- Taylor, James Henry (US, 1893–1972)
- Taylor, Jean (USA, born 1944)
- Taylor, John (mathematician) (England, born 1664)
- Taylor, John Clayton (Britain, born 1930)
- Taylor, John G. (Britain, 1931–2012)
- Taylor, Joseph L. (USA, 1941–2016)
- Taylor, Martin J. (Britain, born 1952)
- Taylor, Michael E. (USA, born 1946)
- Taylor, Richard (Britain, born 1962)
- Taylor, Walter (England, 1700–1744)
- Teck, Gan Wee (Malaysia/China, born 1972)
- Tedone, Orazio (Italy, 1870–1922)
- Teicher, Mina (Israel, ?–?)
- Teichmann, Josef (Austria, born 1972)
- Teichmüller, Oswald (Germany, 1913–1943)
- Teichner, Peter (Germany, born 1963)
- Teillaud, Monique (France, born 1961)
- Teissier, Bernard (France, born 1945)
- Teixeira, Francisco Gomes (Portugal, 1851–1933)
- Teixeira, Luís (Portugal, ?–?)
- Teliti, Xhezair (Albania, born 1948)
- Tello, Jorge Sotomayor (Brazil, born 1942)
- Temam, Roger (France, born 1940)
- Temperley, Harold Neville Vazeille (Britain, 1915–2017)
- Temple, George Frederick James (England/Britain, 1901–1992)
- Tenekedjiev, Kiril (Bulgaria, born 1960)
- Tenenbaum, Gérald (France, born 1952)
- Tenenblat, Keti (Turkey, born 1944)
- Tennenbaum, Stanley (US, 1927–2005)
- Tent, Katrin (Germany, born 1963)
- Tent, M. B. W. (US, ?–?)
- Terazawa, Kwan-ichi (Japan, 1882–1969)
- Terjanian, Guy (Ethnic Armenia/France, ?–?)
- Terlaky, Tamás (?, ?–?)
- Terng, Chuu-Lian (Taiwan, ?–?)
- Terpe, Frank (Germany, 1929–2013)
- Terquem, Olry (France, 1782–1862)
- Terracini, Susanna (Italy, born 1963)
- Terradas i Illa, Esteban (Spain, 1852–1950)
- Terras, Audrey (US, born 1942)
- Terras, Riho (mathematician) (Estonia, 1939–2005)
- Terrot, Charles (Scotland, 1790–1872)
- Terry, John R. (Britain, born 1977)
- Terzioglu, Nazim (Turkey, 1912–1976)
- Terzioğlu, Tosun (Turkey, 1942–2016)
- Teschl, Gerald (Austria, born 1970)
- Teschl, Susanne (Austria, born 1971)
- Testerman, Donna (?, born 1960)
- Tetali, Prasad V. (India, ?–?)
- Tetelbaum, Alexander (US, born 1948)
- Tewari, Udai Bhan (India, born 1944)
- Teyler, Johan (Netherlands, 1648–1709)
- ibn Thabit, Sinan (Medieval Iraq, ?–?)
- Thakur, Dinesh (India, born 1961)
- Thakura, Bhaktisiddhanta Sarasvati (?, 1874–1937)
- Thales of Miletus (Ancient Greece, 620s BC–540s BC)
- Thamwattana, Ngamta (Australia/Thailand, ?–?)
- Thas, Joseph A. (Belgium, born 1944)
- Theaetetus (Ancient Greece, 410s BC–369 BC)
- Theano (Ancient Greece, ?–?)
- Thébault, Victor (France, 1882–1960)
- Theilheimer, Feodor (Germany, 1909–2000)
- Themistoclea (Ancient Greece, ?–?)
- Theodoric of Freiberg (?, 1250–1310)
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- Theodosius of Bithynia (Ancient Greece, 160s BC–100s BC)
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- Theudius (Ancient Greece, ?–?)
- Thibaut, Bernhard Friedrich (Germany, 1775–1832)
- Thibaut, George (?, 1848–1914)
- Thiele, Rüdiger (?, born 1943)
- Thiele, Thorvald N. (Denmark, 1838–1910)
- Thiêm, Lê Văn (Vietnam, 1918–1991)
- Thistlethwaite, Morwen (Britain, ?–?)
- Thom, George (Scotland, 1842–1916)
- Thom, René (France, 1923–2002)
- Thomae, Carl Johannes (Germany, 1840–1921)
- Thomas, Charles Xavier (France, 1785–1870)
- Thomas, Dave (US, born 1953)
- Thomas, David Vaughan (?, 1873–1934)
- Thomas, George B. (US, 1914–2006)
- Thomas, Janet (Australia, ?–?)
- Thomas, Kim (Britain, born 1968)
- Thomas, Llewellyn (Britain, 1903–1992)
- Thomas, Marc (USA, 1950–2017)
- Thomas, Rekha R. (?, ?–?)
- Thomas, Richard (Britain, ?–?)
- Thomas, Robin (Czech Republic, 1962–2020)
- Thomason, Robert Wayne (US, 1952–1995)
- Thomassen, Carsten (Denmark, born 1948)
- Thomaz, Alvaro (Portugal, ?–?)
- Thompson, Abigail (USA, born 1958)
- Thompson, Alexander John (Britain, 1885–1968)
- Thompson, D'Arcy Wentworth (Scotland, 1860–1948)
- Thompson, Gerald L. (US, 1923–2009)
- Thompson, John G. (US, born 1932)
- Thomsen, Gerhard (Germany, 1899–1934)
- Thomson, David J. (Canada, ?–?)
- Thomson, J. J. (England, 1856–1940)
- Thomson, James (Ireland, 1786–1849)
- Thomson, James Bates (USA, 1808–1883)
- Thomson, William (mathematician) (Scotland, 1856–1947)
- Thorin, Olof (Sweden, 1912–2004)
- Thornley, Gillian (New Zealand, born 1940)
- Thornquist, Heidi (?, ?–?)
- Thornton, John Wingate (US, 1818–1878)
- Thorp, Edward O. (US, born 1932)
- Thorp, Willard (US, 1899–1992)
- Thrall, Robert M. (USA, 1914–2006)
- Thrasyllus of Mendes (Ancient Greece, ?–36)
- Three Pillars of Chinese Catholicism (China, 1562–1633)
- Threlfall, William (Germany, 1888–1949)
- Thrivikraman, T. (India, born 1943)
- Thue, Axel (Norway, 1863–1922)
- Thuener, Mary Domitilla (USA, 1880–1977)
- Thullen, Peter (Ecuador/Germany, 1907–1996)
- Thureau-Dangin, François (France, 1872–1944)
- Thurston, William (US, 1946–2012)
- Thymaridas (Ancient Greece, ?–?)
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- Tiburtinus, Plato (Italy, ?–?)
- Tichý, Pavel (Czech Republic, 1936–1994)
- Tichy, Robert F. (Austria, born 1957)
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- Tiit, Ene-Margit (Estonia, born 1934)
- Tijdeman, Robert (Netherlands, born 1943)
- Tijms, Henk (Netherlands, born 1944)
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- Tildesley, Mike (England, ?–?)
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- Tillmann, Ulrike (Germany, born 1962)
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- Tilouine, Jacques (?, ?–?)
- Timeline of women in mathematics in the United States (USA, ?–?)
- Timerding, Heinrich Emil (Germany, 1873–1945)
- Timoshenko, Stephen (?, 1878–1972)
- Timycha (Ancient Greece, ?–?)
- Tinney, Sheila (Ireland, 1918–2010)
- de Tinseau d'Amondans, Charles (France, 1748–1822)
- Tipler, Maryanne (New Zealand, ?–?)
- Tipper, John (England, 1616–1713)
- Tippett, L. H. C. (England, 1902–1985)
- Tippett, Leonard Henry Caleb (England, 1902–1985)
- Tisseur, Françoise (France, ?–?)
- Titchmarsh, Edward Charles (Britain, 1899–1963)
- Țițeica, Gheorghe (Romania, 1873–1939)
- Titi, Edriss (Israel, born 1957)
- Tits, Jacques (Belgium, 1930–2021)
- Tjøstheim, Dag (Norway, born 1945)
- Tjøtta, Jacqueline Naze (France/Norway, 1935–2017)
- Tjøtta, Sigve (Norway, born 1930)
- Tobies, Renate (Germany, born 1947)
- Toda, Hiroshi (Japan, born 1928)
- Toda, Seinosuke (Japan, born 1959)
- Todd, J. A. (Britain, 1908–1994)
- Todd, John (Jack) (US, 1911–2007)
- Todhunter, Isaac (Britain, 1820–1884)
- Todorčević, Stevo (Serbia/Canada, born 1955)
- Todorov, Gordana (?, born 1949)
- Toën, Bertrand (France, born 1973)
- Toeplitz, Otto (Germany, 1881–1940)
- Togliatti, Eugenio Giuseppe (Italy, 1890–1977)
- Tognoli, Alberto (Italy, 1937–2008)
- Tokieda, Tadashi (Japan, born 1968)
- Tokiyuki, Hōjō (Japan, 1858–1929)
- Toland, John (Ireland, born 1949)
- Tollet, George (Ireland, ?–1719)
- Tolman, Susan (USA, ?–?)
- Tolosani, Giovanni Maria (Italy, 1471–1549)
- Tolsa, Xavier (Spain, born 1966)
- Tomczak-Jaegermann, Nicole (Poland/Canada, ?–?)
- Tonelli, Leonida (Italy, 1885–1946)
- Tong, David (?, ?–?)
- Tong, Hing (USA, 1922–2007)
- Tong, Howell (Britain, born 1944)
- Toninelli, Fabio (Italy, born 1975)
- le Tonnelier de Breteuil, Gabrielle Émilie, Marquess du Châtelet (France, 1706–1749)
- Toom, Andrei (Russia/Soviet Union, born 1942)
- Toomer, Gerald J. (Britain, born 1934)
- Toomre, Alar (Estonia, born 1937)
- Toponogov, Victor Andreevich (Soviet Union, 1930–2004)
- Topping, Peter (Britain, born 1971)
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- Tornberg, Anna-Karin (Sweden, ?–?)
- Törnqvist, Leo (Finland, 1911–1983)
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- Torporley, Nathaniel (England, 1564–1632)
- de Torres Villarroel, Diego (Spain, 1693–1770)
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- Torres, Rodolfo H. (Argentina, born 1960)
- Torricelli, Evangelista (Italy, 1608–1647)
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- Tory, Henry Marshall (Canada, 1864–1947)
- Toscanelli, Paolo dal Pozzo (Italy, 1397–1482)
- Toshiaki, Honda (Japan, 1744–1821)
- Totaro, Burt (US, born 1967)
- Tóth, Bálint (Hungary, born 1955)
- Tóth, László Fejes (Hungary, 1915–2005)
- Totik, Vilmos (Hungary, born 1954)
- Touchard, Jacques (France, 1885–1968)
- Tõugu, Enn (Estonia, 1935–2020)
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- Townsend, Paul (Britain, ?–?)
- Townsend, Richard (mathematician) (Ireland, 1821–1884)
- Tozoni, Oleg (Soviet Union, 1927–2012)
- Trachtenberg, Jakow (Russia/Switzerland, 1888–1953)
- Tracy, Craig (US, born 1945)
- Trahtman, Avraham (Israel, born 1944)
- Trail, William (Scotland, 1746–1831)
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- Tralles, Johann Georg (Germany, 1763–1822)
- Tráng, Lê Dũng (Vietnam/France, born 1947)
- Transon, Abel (France, 1805–1876)
- Transue, William Raoul Reagle (US, 1937–2008)
- Tranter, Clement John (Britain, 1909–1991)
- Travis, Edward (Britain, 1888–1956)
- Trefethen, Nick (Britain, born 1955)
- Trehan, Surindar Kumar (India, 1931–2004)
- Treisman, Philip (US, ?–?)
- Trémaux, Charles Pierre (France, ?–?)
- Trembley, Jean (Switzerland, 1749–1811)
- Trenchant, Jean (France, ?–?)
- Trenk, Ann (USA, ?–?)
- Trentelman, Harry (Netherlands, ?–?)
- Tretkoff, Paula (Australia, ?–?)
- Tretter, Christiane (Germany, born 1964)
- Tretyakov, Vladimir (Russia, 1936–2021)
- Treu, Abdias (Germany, 1597–1669)
- Trèves, François (France, born 1930)
- Treweek, Athanasius (Australia, 1912–1995)
- Trewin, Dennis (Australia, born 1946)
- Tricomi, Francesco (Italy, 1897–1978)
- Trkal, Viktor (Czech Republic, 1888–1956)
- Trlifaj, Jan (Czech Republic, born 1954)
- Trnková, Věra (Czech Republic, 1934–2018)
- Troelstra, Anne Sjerp (Netherlands, 1939–2019)
- Tropfke, Johannes (Germany, 1866–1939)
- Tropp, Joel (USA, born 1977)
- Trotman, David (Britain, born 1951)
- Trotter, Hale (Canada, 1931–2022)
- Trotter, William T. (US, ?–?)
- Trubowitz, Eugene (US, ?–?)
- Truchet, Sébastien (France, 1657–1729)
- Trudinger, Neil (Australia, born 1942)
- Truesdell, Clifford (US, 1919–2000)
- Trump, Walter (Germany, born 1953)
- Trybuła, Stanisław (Poland, 1932–2008)
- Trybulec, Andrzej (Poland, 1941–2013)
- Tsaban, Boaz (Israel, born 1973)
- Tsallis, Constantino (Brazil, born 1943)
- Tschinkel, Yuri (Russia/Germany/USA, born 1964)
- von Tschirnhaus, Ehrenfried Walther (Germany, 1651–1708)
- Tsen, Chiungtze C. (China, 1898–1940)
- Tseng, Paul (Canada, 1959–2009)
- Tsetlin, Michael (Soviet Union, 1924–1966)
- Tsetlin, Michael Lvovitch (Russia, 1924–1966)
- Tsimerman, Jacob (Canada, born 1988)
- Tsingou, Mary (USA, born 1928)
- Tsirelson, Boris (Israel, 1950–2020)
- Tsuberbiller, Olga (Russia, 1885–1975)
- Tu, Loring W. (USA, born 1952)
- Tuchman, Walter (?, ?–?)
- Tuck, Ernie (Australia, 1939–2009)
- Tucker, Alan (USA, ?–?)
- Tucker, Albert W. (US, 1905–1995)
- Tucker, Ledyard (US, 1910–2004)
- Tucker, Robert (mathematician) (Britain, 1832–1905)
- Tucker, Thomas W. (USA, born 1945)
- Tucker, Warwick (Sweden, ?–?)
- Tuckerman, Bryant (US, 1915–2002)
- Tuckerman, Laurette (?, born 1956)
- Tufte, Edward (US, born 1942)
- Tukey, John (US, 1915–2000)
- Tukia, Pekka (Finland, ?–?)
- Tuncali, Murat (Canada, born 1959)
- Tunnell, Jerrold B. (US, 1950–2022)
- Tuotilo (?, 850–915)
- Turán, Pál (Hungary, 1910–1976)
- Turchin, Peter (Russia/USA, born 1957)
- Turchin, Valentin (Soviet Union, 1931–2010)
- Turin, John J. (US, 1913–1973)
- Turing, Alan (England, 1912–1954)
- ibn Turk, 'Abd al-Hamīd (Medieval Iraq, ?–?)
- Turkel, Eli (Israel, born 1944)
- Turnbull, Herbert (Britain, 1885–1961)
- Turner, Herbert Arthur Frederick (Britain, 1919–1998)
- Turner, Peter (England, 1586–1652)
- Turok, Neil (South Africa, born 1958)
- Turton, Thomas (?, 1780–1864)
- al-Tusi, Nasir al-Din (Medieval Persia, 1201–1274)
- al-Tusi, Sharaf al-Din (Medieval Persia, 1135–1213)
- Tutte, W. T. (England/Canada, 1917–2002)
- Tuulmets, Leida (Estonia, 1933–2021)
- Tụy, Hoàng (Vietnam, 1927–2019)
- Tveito, Aslak (Norway, born 1961)
- Tverberg, Helge (Norway, 1935–2020)
- Twarock, Reidun (Germany, ?–?)
- Tweedie, Charles (Scotland, 1868–1925)
- Tweedie, David (mathematician) (Scotland, 1865–1934)
- Tweedie, David J. (Scotland, 1870–1926)
- Tweedie, Richard (Australia, 1947–2001)
- Tyrtyshnikov, Evgeny (Russia, born 1955)
- Tyshkevich, Regina (Belarus, 1929–2019)
- Tyurina, Galina (Soviet Union, 1938–1970)
- Tzechanis, Konstantinos (Greece, 1740–1800)
- Tzu, Sun (Medieval China, ?–?)
- Tzwyvel, Dietrich (Germany, 1490–1536)
Mathematics Portal