*" Xenochrist ", a song on the album Planetary Duality by The Faceless

* Duality ( mathematics ), a mathematical concept

** Duality ( order theory ), a concept regarding binary relations

** Duality ( projective geometry ), general principle of projective geometry

* Duality ( electrical circuits ), regarding isomorphism of electrical circuits

* Duality ( mechanical engineering ), regarding isomorphism of some mechanical laws

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

* Duality ( Lisa Gerrard & Pieter Bourke album ), a 1998 album by Lisa Gerrard and Pieter Bourke

* Duality ( Ra album ), a 2005 album by the rock band Ra

** Duality ( 1998 ), with Pieter Bourke

* Blackadder: " The Black Seal " ( 1983 ), " Chains " ( 1986 ), " Duel and Duality " ( 1987 ) — Along with " Goodbyeee " ( 1989 ), the final episodes of the Blackadder series took a liberty that many series would be unable to take, by killing off the major characters ( apart from in Blackadder the Third when only Prince George died ).

* Duality, a 2007 single from alternative rock / punk band Bayside

* Berthold-Georg Englert, Marlan O. Scully & Herbert Walther, Quantum Optical Tests of Complementarity, Nature, Vol 351, pp 111 – 116 ( 9 May 1991 ) and ( same authors ) The Duality in Matter and Light Scientific American, pg 56 – 61, ( December 1994 ).

* Berthold-Georg Englert, Marlan O. Scully & Herbert Walther, Quantum Optical Tests of Complementarity, Nature, Vol 351, pp 111 – 116 ( 9 May 1991 ) and ( same authors ) The Duality in Matter and Light Scientific American, pg 56 – 61, ( December 1994 ).

* Gray, E. & Tall, D. ( 1994 ) " Duality, Ambiguity, and Flexibility: A " Proceptual " View of Simple Arithmetic ", Journal for Research in Mathematics Education 25 ( 2 ) p. 116-40.

* Duality: Every statement, theorem, or definition in category theory has a dual which is essentially obtained by " reversing all the arrows ".

* Duality, a large format audio mixing console by Solid State Logic

According to Giddens there is a " Duality of structure " by which social practice, which is the principal unit of investigation, has both a structural and an agency-component.

Duality in the projective plane is a special case of duality for projective spaces, transformations of PG ( n, K ) ( also denoted by KP < sup > n </ sup >) with K a field, that interchange objects of dimension r with objects of dimension n-1-r ( = codimension r + 1 ).

The Lotus Sutra's parable of the Burning House implies that all talk of Duality or Non-Duality by Buddhas and Bodhisattvas is merely Skillful Means ( Sanskrit upaya kausala ) meant to lead the deluded to a much higher truth.

Formally, this is captured by the Duality Principle for ordered sets:

* K3 Surfaces and String Duality, by Paul Aspinwall

: From the point of view of the definition, this is an expression of the Poincaré Duality isomorphism where is the quotient of the field of fractions of by, considered as a-module, and where is the conjugate-module to ie: as an abelian group it is identical to but the covering transformation acts by.

A treatment of this theory, Residues and Duality ( 1966 ) by Robin Hartshorne, became an accessible reference.

* Quantum Principal Bundles and Tannaka – Krein Duality by Mico Durdevic

Duality is a 2005 album from the band Ra.

* " Alien " ( song ), by Pennywise

* Austin ( song ), a single by Blake Shelton

Animals sacred to Apollo included wolves, dolphins, roe deer, swans, cicadas ( symbolizing music and song ), hawks, ravens, crows, snakes ( referencing Apollo's function as the god of prophecy ), mice and griffins, mythical eagle – lion hybrids of Eastern origin.

* " Atlantic " ( song ), by Keane

* " Atomic " ( song ), a song by Blondie

* " Abduction " ( song ), a 2005 song by Iron Maiden vocalist Bruce Dickinson

The one occasion where the band was introduced as " The Alan Parsons Project " in a live performance was at Night of the Proms 1990 ( at the time of the group's break-up ), featuring all Project regulars except Woolfson who was present but behind the scenes, while Parsons stayed at the mixer except during the last song, where he played acoustic guitar.

* Atmosphere ( Joy Division song ), a song by Joy Division, released in 1980 on the Atmosphere / She's Lost Control single, originally released in the same year as Licht und Blindheit

The original song Advance Australia Fair was composed by Peter Dodds McCormick under the pen-name ' Amicus ' ( which means ' friend ' in Latin ), in the late 19th century, and first performed by Andrew Fairfax at a Highland Society function in Sydney on 30 November 1878.

She has referenced this independence from major labels in song more than once, including " The Million You Never Made " ( Not A Pretty Girl ), which discusses the act of turning down a lucrative contract, " The Next Big Thing " ( Not So Soft ), which describes an imagined meeting with a label head-hunter who evaluates the singer based on her looks, and " Napoleon " ( Dilate ), which sympathizes sarcastically with an unnamed friend who did sign with a label.

** " ABC " ( song ), a 1970 song by The Jackson 5

** " ABC " ( Jin song ), Jin's first single off his 4th album " ABC " ( American-born Chinese )

* ABCs ( song ), the first official single by rapper K ' naan on his album Troubadour

The term anthem means either a specific form of Anglican church music ( in music theory and religious contexts ), or more generally, a song ( or composition ) of celebration, usually acting as a symbol for a distinct group of people, as in the term " national anthem " or " sports anthem ".

Grant followed the album with her second Christmas album, Home For Christmas in 1992, which included the song " Breath of Heaven ( Mary's Song )", written by Chris Eaton and Grant, and would later be covered by many artists, including Donna Summer, Jessica Simpson ( who acknowledged Grant as one of her favorite artists ), Vince Gill, Sara Groves, Point of Grace, and Broadway star Barbara Cook.

* Amphibian ( song ), a song by Björk

Among other composers who set Housman songs were John Ireland ( song cycle, Land of Lost Content ), Michael Head ( e. g. ' Ludlow Fair '), Graham Peel ( a famous version of ' In Summertime on Bredon '), Ian Venables ( Songs of Eternity and Sorrow ), and the American Samuel Barber ( e. g. ' With rue my heart is laden ').