Definitions for "Duality"
The quality or condition of being two or twofold; dual character or usage.
being twofold; a classification into two opposed parts or subclasses; "the dichotomy between eastern and western culture"
a dual state or quality, composed or consisting of twofold or double character or nature
Duality is a collaborative work by Lisa Gerrard and Pieter Bourke released in 1998. It is sometimes said to be a Dead Can Dance album, but is not as Brendan Perry, who formed Dead Can Dance with Lisa Gerrard did not participate.
Duality is a 2005 album by rock band Ra.
Duality is the name of the first single from Slipknot's third studio album (fourth when counting their independantly released EP, Mate Feed Kill Repeat) Vol. 3: (The Subliminal Verses). They performed this song on various late night talk shows in support of the new album. The song is also featured on Slipknot's live album 9.0: Live.
(geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry
an isomorphism from an incidence structure to its dual
In the geometry of projective spaces, including the projective plane, duality concerns the interchangeability between points and lines which preserves incidence properties.
The study and use of dual mathematical programs.
Although the concept of duality goes back to the last century, it has only been the last few years that it string theories were seen to possess a duality structure. Simply put, two theories are said to be dual to each other if they describe the same physics using different language. Because we usually only have perturbation theory to investigate a theory with, two theories may appear completely different. However it is now believed that the non-perturbative regime (i.e. where the perturbative expansion does not provide a reliable approximation) of one string theory is actually described by the perturbative regime of another string theory. In this way it is thought that all the string theories are in fact different aspects of one underlying theory, M theory. Duality is thus a very powerful tool in understanding the full physics of a theory.
(physics) the property of matter and electromagnetic radiation that is characterized by the fact that some properties can be explained best by wave theory and others by particle theory
Keywords:  perception, belief, flicker, obe, god
(result of the belief there must be an opposite of something, good, bad,etc.)
in Buddhism (particularly Zen) this refers to the apparent separation of me from other than me.
When used as a religious term, this denotes the separation of two opposites and places those characteristics into two God forms. For example, good and evil, as characterized by the Christian God and Devil.
Duality in neoclassical microeconomics refers to the existence, under appropriate regularity conditions, of indirect (or dual) functions which embody the same essential information on preferences or technology as the more familiar direct (or primal) functions such as production and utility functions. Dual functions contain information about both optimal behavior and structure of the underlying technology or preferences, whereas the primal functions describe only the latter. Many relationships that are difficult to understand when looked at directly become simple, or even trivial, when looked at using the tools of duality (Varian).
Financial institutions that are members of both MasterCard and Visa Associations.
The membership of a financial institution in both MasterCard and Visa associations.
Pairs of interconnected opposites, neither of which can exist without the other (i.e., beauty-ugliness, positive-negative, male-female, etc.); one of the mechanisms by which the totality of manifestation operates; when the ego becomes involved, duality becomes dualism; see ego, dualism
the characteristic of being two fold, having two sides
The condition of one thing having two sides, parts, or faces.
a hidden connection between two vastly different looking theoretical pictures that can transform one into the other and vice versa
A New Age no no; considered to be very 3rd dimensional (i.e. unevolved).
the concept that electrons (and all particles) behave both as classical particles and as waves depending on how they are observed (so never both at the same time)
The tendency of something to behave in two very different ways, for example, as both energy and matter.
Keywords:  nothing, twice, still
twice nothing is still nothing
In electrical engineering, electrical terms are associated into pairs called duals.