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  2. Set (mathematics) - Wikipedia

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

    A set of polygons in an Euler diagram This set equals the one depicted above since both have the very same elements.. In mathematics, a set is a collection of different [1] things; [2] [3] [4] these things are called elements or members of the set and are typically mathematical objects of any kind: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other ...

  3. List of types of sets - Wikipedia

    en.wikipedia.org/wiki/List_of_types_of_sets

    8 Ways of defining sets/Relation to descriptive set theory. 9 More general objects still called ... List of types of functions This page was last edited on 20 April ...

  4. List of set identities and relations - Wikipedia

    en.wikipedia.org/wiki/List_of_set_identities_and...

    This article lists mathematical properties and laws of sets, involving the set-theoretic operations of union, intersection, and complementation and the relations of set equality and set inclusion. It also provides systematic procedures for evaluating expressions, and performing calculations, involving these operations and relations.

  5. Set theory - Wikipedia

    en.wikipedia.org/wiki/Set_theory

    Set theory is the branch of mathematical logic that studies sets, which can be informally described as collections of objects.Although objects of any kind can be collected into a set, set theory – as a branch of mathematics – is mostly concerned with those that are relevant to mathematics as a whole.

  6. Category of sets - Wikipedia

    en.wikipedia.org/wiki/Category_of_sets

    Set is the prototype of a concrete category; other categories are concrete if they are "built on" Set in some well-defined way. Every two-element set serves as a subobject classifier in Set. The power object of a set A is given by its power set, and the exponential object of the sets A and B is given by the set of all functions from A to B.

  7. List of set theory topics - Wikipedia

    en.wikipedia.org/wiki/List_of_set_theory_topics

    Infinity-Borel set; Lightface analytic game; Perfect set property; Polish space; Prewellordering; Projective set; Property of Baire; Uniformization (set theory) Universally measurable set; Determinacy. AD+; Axiom of determinacy; Axiom of projective determinacy; Axiom of real determinacy; Empty set; Forcing (mathematics) Fuzzy set; Hereditary ...

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