What does self-dual mean?

Definitions for self-dual
self-du·al

This dictionary definitions page includes all the possible meanings, example usage and translations of the word self-dual.

Wiktionary

  1. self-dualadjective

    Of a proposition that is equivalent to its dual.

  2. self-dualadjective

    Of a graph or polyhedron that is the dual of itself.

Wikipedia

  1. self-dual

    In mathematics, a duality translates concepts, theorems or mathematical structures into other concepts, theorems or structures, in a one-to-one fashion, often (but not always) by means of an involution operation: if the dual of A is B, then the dual of B is A. Such involutions sometimes have fixed points, so that the dual of A is A itself. For example, Desargues' theorem is self-dual in this sense under the standard duality in projective geometry. In mathematical contexts, duality has numerous meanings. It has been described as "a very pervasive and important concept in (modern) mathematics" and "an important general theme that has manifestations in almost every area of mathematics".Many mathematical dualities between objects of two types correspond to pairings, bilinear functions from an object of one type and another object of the second type to some family of scalars. For instance, linear algebra duality corresponds in this way to bilinear maps from pairs of vector spaces to scalars, the duality between distributions and the associated test functions corresponds to the pairing in which one integrates a distribution against a test function, and Poincaré duality corresponds similarly to intersection number, viewed as a pairing between submanifolds of a given manifold.From a category theory viewpoint, duality can also be seen as a functor, at least in the realm of vector spaces. This functor assigns to each space its dual space, and the pullback construction assigns to each arrow f: V → W its dual f∗: W∗ → V∗.

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Numerology

  1. Chaldean Numerology

    The numerical value of self-dual in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of self-dual in Pythagorean Numerology is: 8


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"self-dual." Definitions.net. STANDS4 LLC, 2024. Web. 19 Mar. 2024. <https://www.definitions.net/definition/self-dual>.

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