519,064 articles
Torsion subgroup
The torsion subgroup of an abelian group G is the subgroup of all elements of finite order; a finite abelian group equals its own torsion subgroup.
Torsion tensor
The torsion tensor, introduced by Élie Cartan in 1922, measures the failure of an affine connection to be symmetric; a connection with zero torsion is called torsion-free.
Torsion test
A torsion test twists a material specimen about its axis while measuring torque and angle of twist, determining shear modulus, yield and ultimate shear strength, and ductility.
Torsion-free module
A torsion-free module is a module over an integral domain in which no nonzero element is killed by a nonzero ring element, generalizing torsion-free abelian groups.
Torsional buckling
Torsional buckling is a stability failure of a compressed member whose cross section twists about its shear center, occurring in sections weak in torsion, notably cruciforms.
Torsional Diffusion
Torsional Diffusion is a machine learning method for generating 3D molecular conformers, published at NeurIPS 2022 by Bowen Jing, Gabriele Corso, and colleagues at MIT, that diffuses only torsion angles.
Torsional nystagmus
Torsional (rotary) nystagmus: involuntary twisting eye movements about the line of sight, usually conjugate. Caused by vertical semicircular canal dysfunction; common causes are infarction and multiple sclerosis, with high specificity for central lesions.
Torsional strain
Torsional strain, or Pitzer strain, is the energy increase that arises when bonds on adjacent atoms are eclipsed instead of staggered; in ethane it makes a barrier of about 3 kcal/mol to rotation.
Torsional vibration
Torsional vibration is the angular oscillation of a rotating shaft about its own axis, analyzed with torsional stiffness and inertia, and controlled through stiffness distribution and dampers.
Torsor (algebraic geometry)
A torsor in algebraic geometry, also called a principal homogeneous space, is a scheme with a simply transitive group-scheme action, locally trivial over a covering of the base.
Torstein Hagen
Torstein Hagen is a Norwegian shipping executive who founded the Viking river and ocean cruise line in 1997, built it to 109 ships, and remains its controlling owner.
Torsten Bell
Torsten Bell is a British Labour politician, MP for Swansea West since 2024 and Pensions Minister since 2025, working across HM Treasury and the Department for Work and Pensions.
Torsten Brezesinski
Torsten Brezesinski is a materials scientist who leads battery research in the KIT/BASF joint laboratory BELLA at Karlsruhe Institute of Technology, known for ordered mesoporous electrode materials.
Torsten Burmester
Torsten Burmester, born 1963, is a German SPD politician and former head of the German Olympic Sports Confederation who has served as Mayor of Cologne since 2025.
Torsten C. Schmidt
Torsten C. Schmidt, also known as Torsten Schmidt, is a German environmental chemist who has held the Instrumental Analytical Chemistry chair at Duisburg-Essen since 2006.
Torsten Carleman
Torsten Carleman (1892–1949) was a Swedish mathematician who worked in classical analysis, named the Carleman inequality, Denjoy–Carleman theorem, Carleman estimates, and Carleman linearization, and directed the Mittag-Leffler Institute.
Torsten Frings
Torsten Frings (born 1976, Würselen) is a German former defensive midfielder and coach; 79 caps for Germany, 2002 World Cup runner-up, Bundesliga 2005 with Bayern, Werder Bremen captain, later Darmstadt and Meppen head coach.
Torsten Gutsche
Torsten Gutsche (Torsten René Gutsche), born 1968 in Eisenhüttenstadt, German sprint canoeist; with Kay Bluhm won three Olympic K2 golds and one silver (1992, 1996) and 11 world titles.
Torsten Hellman
Torsten Hellman (Torsten J:son Hellman, 1878–1944) was a Swedish anatomist and histologist, professor at Lund University, whose reaction-center hypothesis on lymphatic follicles prevailed over the doctrine that they produce lymphocytes.
Torsten Lindberg
Torsten Lindberg (1917–2009), Swedish goalkeeper, Olympic gold 1948 with Sweden, six Swedish titles with IFK Norrköping, later national team coach and Djurgården champion coach, Hall of Fame 2023.
Torsten May
Torsten May, German boxer born 1969 in Glauchau, 1992 Olympic light-heavyweight gold medalist and 1991 world amateur champion; later IBF cruiserweight title challenger and Cologne boxing coach.
Torsten O. Nielsen
Torsten O. Nielsen is a Canadian pathologist and full professor at the University of British Columbia known for molecular sarcoma diagnostics and co-inventing the FDA-cleared PAM50 breast cancer test.
Torsten Persson
Torsten Persson, born 1954 in Stockholm, is a Swedish economist at Stockholm University whose work with Guido Tabellini helped establish political economy as a subdiscipline.
Torsten Reil
Torsten Reil is a German entrepreneur who co-founded the defense AI company Helsing and earlier founded the games studio NaturalMotion, sold to Zynga in 2014.
Torsten Schwede
Torsten Schwede is a German-Swiss structural bioinformatician and professor at the University of Basel, known for developing SWISS-MODEL and president of the SNSF Research Council since 2025.
Torsten Thunberg
Torsten Thunberg (1873–1952) was a Swedish physiologist who held the chair at Lund University from 1905 to 1938 and pioneered the study of biological oxidation through dehydrogenases.
Torsten Ullman
Torsten Ullman (Torsten Elis Ullman, 1908–1993), Swedish pistol shooter; won 1936 Berlin Olympic gold in 50 m free pistol with world-record 559, bronzes in 1936 rapid-fire and 1948 free pistol, five Olympics, nine world titles.
Torsten Wiesel
Torsten Nils Wiesel is a Swedish-born neuroscientist who shared the 1981 Nobel Prize in Physiology or Medicine with David Hubel for discoveries about processing in the visual system.
Torstenson War
Torstenson War (Torstenssonfejden, Torstenssons krig), 1643–1645 Danish-Swedish conflict within the Thirty Years' War. Lennart Torstensson invaded Denmark without declaration; naval defeats at Kolberger Heide and Fehmarn forced the Peace of Brömsebro, ceding Gotland, Ösel, Jämtland, Härjedalen, and Halland.
Tort
A tort is a civil wrong, an act or omission causing injury or harm to another for which courts impose liability, chiefly through monetary damages.