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  2. Mathematical object - Wikipedia

    en.wikipedia.org/wiki/Mathematical_object

    Mathematical constructivism asserts that it is necessary to find (or "construct") a specific example of a mathematical object in order to prove that an example exists. Contrastingly, in classical mathematics, one can prove the existence of a mathematical object without "finding" that object explicitly, by assuming its non-existence and then ...

  3. Lists of mathematics topics - Wikipedia

    en.wikipedia.org/wiki/Lists_of_mathematics_topics

    Many mathematics journals ask authors of research papers and expository articles to list subject codes from the Mathematics Subject Classification in their papers. The subject codes so listed are used by the two major reviewing databases, Mathematical Reviews and Zentralblatt MATH.

  4. Class (set theory) - Wikipedia

    en.wikipedia.org/wiki/Class_(set_theory)

    Examples include the class of all groups, the class of all vector spaces, and many others. In category theory, a category whose collection of objects forms a proper class (or whose collection of morphisms forms a proper class) is called a large category. The surreal numbers are a proper class of objects that have the properties of a field.

  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 theory - Wikipedia

    en.wikipedia.org/wiki/Category_theory

    Category theory is used in almost all areas of mathematics. In particular, many constructions of new mathematical objects from previous ones that appear similarly in several contexts are conveniently expressed and unified in terms of categories. Examples include quotient spaces, direct products, completion, and duality.

  7. Portal:Mathematics - Wikipedia

    en.wikipedia.org/wiki/Portal:Mathematics

    Mathematics is the study of representing and reasoning about abstract objects (such as numbers, points, spaces, sets, structures, and games). Mathematics is used throughout the world as an essential tool in many fields, including natural science , engineering , medicine , and the social sciences .

  8. Category:Mathematical objects - Wikipedia

    en.wikipedia.org/wiki/Category:Mathematical_objects

    List of mathematical objects; Mathematical object; C. Condensation point ... Inhabited set; N. Number; S. Set (mathematics) This page was last edited on 8 May 2023 ...

  9. Group object - Wikipedia

    en.wikipedia.org/wiki/Group_object

    In category theory, a branch of mathematics, group objects are certain generalizations of groups that are built on more complicated structures than sets. A typical example of a group object is a topological group , a group whose underlying set is a topological space such that the group operations are continuous .

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