Duality may refer to:
Mathematics Duality (mathematics), a mathematical concept Dual (category theory), a formalization of mathematical duality Duality (optimization) Duality (order theory), a concept regarding binary relations Duality (projective geometry), general principle of projective geometry Duality principle (Boolean algebra), the extension of order-theoretic duality to Boolean algebras S-duality (homotopy theory)
Philosophy, logic, and psychology Dualistic cosmology, a twofold division in several spiritual and religious worldviews Dualism (philosophy of mind), where the body and mind are considered to be irreducibly distinct De Morgan's laws, specifically the ability to generate the dual of any logical expression Complementary duality of Carl Jung's functions and types in Socionics Duality (CoPs), refers to the notion of a duality in a Community of Practice
Science Electrical and mechanical Duality (electrical circuits), regarding isomorphism of electrical circuits Duality (mechanical engineering), regarding isomorphism of some mechanical laws
Physics AdS/CFT correspondence (anti de Sitter/conformal field theory correspondence), sometimes called the Maldacena duality Dual resonance model Duality (electricity and magnetism) Englert–Greenberger duality relation Holographic duality Kramers–Wannier duality List of dualities § Physics Mirror symmetry (string theory) Montonen–Olive duality Mysterious duality String duality, a class of symmetries S-duality T-duality U-duality Wave–particle duality
Music Albums Duality (Peter Leitch and John Hicks album), 1994 Duality (Lisa Gerrard and Pieter Bourke album), 1998 Duality (Set It Off album), 2014 Duality (Ra album), 2005 Duality (mixtape), by Captain Murphy, 2012 Duality (Luna Li album), 2022 Duality (Lindsey Stirling album), 2024 Duality, a 2009 album by Darker Half Duality, a 2020 album by Duke Dumont Duality, a 2018 album by Big Scoob Duality, a 2002 album by Terje Gewelt
Songs "Duality", a 2014 single from pop rock/punk rock band Set It Off "Duality" (song), a 2004 single by metal band Slipknot "Duality", a 2007 single from alternative rock/punk band Bayside
Other Duality (film), a 2001 Star Wars fan film by Dave Macomber and Mark Thomas Duality, a large format audio mixing console by Solid State Logic Dual (grammatical number), grammatical number that some languages use in addition to singular and plural
See also Double (disambiguation) Dual (disambiguation) Duality principle (disambiguation) List of dualities: philosophy, mathematics, physics and engineering Nondualism (philosophy) Triality (mathematics)