Duality

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Duality may refer to:

Mathematics

• Duality (mathematics), a mathematical concept
  • Dual (category theory), a formalization of mathematical duality
  • Duality (order theory), a concept regarding binary relations
  • Duality (projective geometry), general principle of projective geometry
  • S-duality (homotopy theory)
  • Duality (optimization)
• List of dualities (Mathematics)

Philosophy, logic, and psychology

• Dualism, a twofold division in several spiritual, religious, and philosophical doctrines
• 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.

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
• Montonen–Olive duality
• Mysterious duality
• String duality is a class of symmetries
  • S-duality
  • T-duality
  • U-duality
• Wave–particle duality

Titles

Film

• Duality (film), a Star Wars fan film by Dave Macomber and Mark Thomas

Music

Albums

• Duality (Ra album), a 2005 album by the rock band Ra
• Duality (Lisa Gerrard & Pieter Bourke album), a 1998 album by Lisa Gerrard and Pieter Bourke
• Duality (Captain Murphy album), a 2012 rap mixtape from Captain Murphy
• Duality, a 2014 album and song by orchestral pop-punk band, Set It Off

Songs

• Duality, a 2014 single from pop rock/punk rock band Set It Off
• Duality (song), a 2004 single & Grammy-nominated song by metal band Slipknot
• Duality, a 2007 single from alternative rock/punk band Bayside (band)

Other

• Duality, a large format audio mixing console by Solid State Logic
• Duality (CoPs) refers to the notion of a duality in a Community of Practice
• 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)