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  2. Duality (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Duality_(mathematics)

    Theorems showing that certain objects of interest are the dual spaces (in the sense of linear algebra) of other objects of interest are often called dualities. Many of these dualities are given by a bilinear pairing of two K-vector spaces A ⊗ B → K. For perfect pairings, there is, therefore, an isomorphism of A to the dual of B.

  3. List of dualities - Wikipedia

    en.wikipedia.org/wiki/List_of_dualities

    In mathematics, a duality, generally speaking, 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.

  4. Duality (projective geometry) - Wikipedia

    en.wikipedia.org/wiki/Duality_(projective_geometry)

    This correlation would also map a line determined by two points (a 1, b 1, c 1, d 1) and (a 2, b 2, c 2, d 2) to the line which is the intersection of the two planes with equations a 1 x + b 1 y + c 1 z + d 1 w = 0 and a 2 x + b 2 y + c 2 z + d 2 w = 0. The associated sesquilinear form for this correlation is: φ(u, x) = u H ⋅ x P = u 0 x 0 ...

  5. Duality (CoPs) - Wikipedia

    en.wikipedia.org/wiki/Duality_(CoPs)

    The designed–emergent duality focuses on time and captures the tension between pre-planned and emergent activities. Designers can plan an activity that is designed to achieve a particular purpose however, some activities emerge through interaction and participation of the community; these are unplanned and may be contrary to what the designers intended.

  6. Duality - Wikipedia

    en.wikipedia.org/wiki/Duality

    Duality (mathematics), a mathematical concept Dual (category theory), a formalization of mathematical duality Duality (optimization) Duality (order theory), a concept regarding binary relations

  7. Fountas and Pinnell reading levels - Wikipedia

    en.wikipedia.org/wiki/Fountas_and_Pinnell...

    Small books containing a combination of text and illustrations are then provided to educators for each level. [3] While young children display a wide distribution of reading skills, each level is tentatively associated with a school grade. Some schools adopt target reading levels for their pupils.

  8. Duality (optimization) - Wikipedia

    en.wikipedia.org/wiki/Duality_(optimization)

    In mathematical optimization theory, duality or the duality principle is the principle that optimization problems may be viewed from either of two perspectives, the primal problem or the dual problem.

  9. Stone duality - Wikipedia

    en.wikipedia.org/wiki/Stone_duality

    In mathematics, there is an ample supply of categorical dualities between certain categories of topological spaces and categories of partially ordered sets.Today, these dualities are usually collected under the label Stone duality, since they form a natural generalization of Stone's representation theorem for Boolean algebras.

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