List of geometers

• Baudhayana (fl. c. 800 BC) – Euclidean geometry • Manava (c. 750 BC–690 BC) – Euclidean geometry • Thales of Miletus (c. 624 BC – c. 546 BC) – Euclidean geometry • Pythagoras (c. 570 BC – c. 495 BC) – Euclidean geometry, Pythagorean theorem • Zeno of Elea (c. 490 BC – c. 430 BC) – Euclidean geometry • Hippocrates of Chios (born c. 470 – 410 BC) – first systematically organized Stoicheia – Elements (geometry textbook) • Mozi (c. 468 BC – c. 391 BC) • Plato (427–347 BC) • Theaetetus (c. 417 BC – 369 BC) • Autolycus of Pitane (360–c. 290 BC) – astronomy, spherical geometry • Euclid (fl. 300 BC) – Elements, Euclidean geometry (sometimes called the "father of geometry") • Apollonius of Perga (c. 262 BC – c. 190 BC) – Euclidean geometry, conic sections • Archimedes (c. 287 BC – c. 212 BC) – Euclidean geometry • Eratosthenes (c. 276 BC – c. 195/194 BC) – Euclidean geometry • Katyayana (c. 3rd century BC) – Euclidean geometry == 1–1300 AD ==

• Hero of Alexandria (c. AD 10–70) – Euclidean geometry • Pappus of Alexandria (c. AD 290–c. 350) – Euclidean geometry, projective geometry • Hypatia of Alexandria (c. AD 370–c. 415) – Euclidean geometry • Brahmagupta (597–668) – Euclidean geometry, cyclic quadrilaterals • Vergilius of Salzburg (c.700–784) – Irish bishop of Aghaboe, Ossory and later Salzburg, Austria; antipodes, and astronomy • Al-Abbās ibn Said al-Jawharī (c. 800–c. 860) • Thabit ibn Qurra (826–901) – analytic geometry, non-Euclidean geometry, conic sections • Abu'l-Wáfa (940–998) – spherical geometry, spherical triangles • Ibn al-Haytham (965–c. 1040) • Omar Khayyam (1048–1131) – algebraic geometry, conic sections • Ibn Maḍāʾ (1116–1196) == 1301–1800 AD ==

• Piero della Francesca (1415–1492) • Leonardo da Vinci (1452–1519) – Euclidean geometry • Jyesthadeva (c. 1500 – c. 1610) – Euclidean geometry, cyclic quadrilaterals • Marin Getaldić (1568–1626) • Jacques-François Le Poivre (1652–1710) – projective geometry • Johannes Kepler (1571–1630) – (used geometric ideas in astronomical work) • Edmund Gunter (1581–1686) • Girard Desargues (1591–1661) – projective geometry; Desargues' theorem • René Descartes (1596–1650) – invented the methodology of analytic geometry, also called Cartesian geometry after him • Pierre de Fermat (1607–1665) – analytic geometry • Blaise Pascal (1623–1662) – projective geometry • Christiaan Huygens (1629–1695) – evolute • Giordano Vitale (1633–1711) • Philippe de La Hire (1640–1718) – projective geometry • Isaac Newton (1642–1727) – 3rd-degree algebraic curve • Giovanni Ceva (1647–1734) – Euclidean geometry • Johann Jacob Heber (1666–1727) – surveyor and geometer • Giovanni Gerolamo Saccheri (1667–1733) – non-Euclidean geometry • Leonhard Euler (1707–1783) • Tobias Mayer (1723–1762) • Johann Heinrich Lambert (1728–1777) – non-Euclidean geometry • Gaspard Monge (1746–1818) – descriptive geometry • John Playfair (1748–1819) – Euclidean geometry • Lazare Nicolas Marguerite Carnot (1753–1823) – projective geometry • Joseph Diaz Gergonne (1771–1859) – projective geometry; Gergonne point • Carl Friedrich Gauss (1777–1855) – Theorema Egregium • Louis Poinsot (1777–1859) • Siméon Denis Poisson (1781–1840) • Jean-Victor Poncelet (1788–1867) – projective geometry • Augustin-Louis Cauchy (1789–1857) • August Ferdinand Möbius (1790–1868) – Euclidean geometry • Nikolai Ivanovich Lobachevsky (1792–1856) – hyperbolic geometry, a non-Euclidean geometry • Michel Chasles (1793–1880) – projective geometry • Germinal Dandelin (1794–1847) – Dandelin spheres in conic sections • Jakob Steiner (1796–1863) – champion of synthetic geometry methodology, projective geometry, Euclidean geometry == 1801–1900 AD ==

• Karl Wilhelm Feuerbach (1800–1834) – Euclidean geometry • Julius Plücker (1801–1868) • János Bolyai (1802–1860) – hyperbolic geometry, a non-Euclidean geometry • Christian Heinrich von Nagel (1803–1882) – Euclidean geometry • Johann Benedict Listing (1808–1882) – topology • Hermann Günther Grassmann (1809–1877) – exterior algebra • Ludwig Otto Hesse (1811–1874) – algebraic invariants and geometry • Ludwig Schlafli (1814–1895) – Regular 4-polytope • Pierre Ossian Bonnet (1819–1892) – differential geometry • Arthur Cayley (1821–1895) • Joseph Bertrand (1822–1900) • Delfino Codazzi (1824–1873) – differential geometry • Bernhard Riemann (1826–1866) – elliptic geometry (a non-Euclidean geometry) and Riemannian geometry • Julius Wilhelm Richard Dedekind (1831–1916) • Ludwig Burmester (1840–1927) – theory of linkages • Edmund Hess (1843–1903) • Albert Victor Bäcklund (1845–1922) • Max Noether (1844–1921) – algebraic geometry • Henri Brocard (1845–1922) – Brocard points • William Kingdon Clifford (1845–1879) – geometric algebra • Pieter Hendrik Schoute (1846–1923) • Felix Klein (1849–1925) • Sofia Vasilyevna Kovalevskaya (1850–1891) • Evgraf Fedorov (1853–1919) • Henri Poincaré (1854–1912) • Luigi Bianchi (1856–1928) – differential geometry • Alicia Boole Stott (1860–1940) • Hermann Minkowski (1864–1909) – non-Euclidean geometry • Henry Frederick Baker (1866–1956) – algebraic geometry • Élie Cartan (1869–1951) • Dmitri Egorov (1869–1931) – differential geometry • Veniamin Kagan (1869–1953) • Raoul Bricard (1870–1944) – descriptive geometry • Ernst Steinitz (1871–1928) – Steinitz's theorem • Marcel Grossmann (1878–1936) • Oswald Veblen (1880–1960) – projective geometry, differential geometry • Nathan Altshiller Court (1881–1968) – author of College Geometry • Emmy Noether (1882–1935) – algebraic topology • Harry Clinton Gossard (1884–1954) • Arthur Rosenthal (1887–1959) • Helmut Hasse (1898–1979) – algebraic geometry == 1901–present ==

• William Vallance Douglas Hodge (1903–1975) • Patrick du Val (1903–1987) • Beniamino Segre (1903–1977) – combinatorial geometry • J. C. P. Miller (1906–1981) • André Weil (1906–1998) – Algebraic geometry • H. S. M. Coxeter (1907–2003) – theory of polytopes, non-Euclidean geometry, projective geometry • J. A. Todd (1908–1994) • Daniel Pedoe (1910–1998) • Shiing-Shen Chern (1911–2004) – differential geometry • Ernst Witt (1911–1991) • Rafael Artzy (1912–2006) • Aleksandr Danilovich Aleksandrov (1912–1999) • László Fejes Tóth (1915–2005) • Edwin Evariste Moise (1918–1998) • Aleksei Pogorelov (1919–2002) – differential geometry • Magnus Wenninger (1919–2017) – polyhedron models • Jean-Louis Koszul (1921–2018) • Isaak Yaglom (1921–1988) • Eugenio Calabi (1923–2023) • Benoit Mandelbrot (1924–2010) – fractal geometry • Katsumi Nomizu (1924–2008) – affine differential geometry • Michael S. Longuet-Higgins (1925–2016) • John Leech (1926–1992) • Alexander Grothendieck (1928–2014) – algebraic geometry • Branko Grünbaum (1929–2018) – discrete geometry • Michael Atiyah (1929–2019) • Lev Semenovich Pontryagin (1908–1988) • Geoffrey Colin Shephard (1927–2016) • Norman W. Johnson (1930–2017) • John Milnor (1931–) • Roger Penrose (1931–) • Yuri Manin (1937–2023) – algebraic geometry and diophantine geometry • Vladimir Arnold (1937–2010) – algebraic geometry • Ernest Vinberg (1937–2020) • J. H. Conway (1937–2020) – sphere packing, recreational geometry • Robin Hartshorne (1938–) – geometry, algebraic geometry • Phillip Griffiths (1938–) – algebraic geometry, differential geometry • Enrico Bombieri (1940–) – algebraic geometry • Robert Williams (1942–) • Peter McMullen (1942–) • Richard S. Hamilton (1943–2024) – differential geometry, Ricci flow, Poincaré conjecture • Mikhail Gromov (1943–) • Rudy Rucker (1946–) • William Thurston (1946–2012) • Shing-Tung Yau (1949–) • Michael Freedman (1951–) • Egon Schulte (1955–) – polytopes • George W. Hart (1955–) – sculptor • Károly Bezdek (1955–) – discrete geometry, sphere packing, Euclidean geometry, non-Euclidean geometry • Simon Donaldson (1957–) • Kenji Fukaya (1959–) – symplectic geometry • Yong-Geun Oh (1961–) • Toshiyuki Kobayashi (1962–) • Hiraku Nakajima (1962–) – representation theory and geometry • Hwang Jun-Muk (1963–) – algebraic geometry, differential geometry • Grigori Perelman (1966–) – Poincaré conjecture • Maryam Mirzakhani (1977–2017) • Denis Auroux (1977–) == Geometers in art ==