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Inhabited set information


In mathematics, a set is inhabited if there exists an element .

In classical mathematics, the property of being inhabited is equivalent to being non-empty. However, this equivalence is not valid in constructive or intuitionistic logic, and so this separate terminology is mostly used in the set theory of constructive mathematics.

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Inhabited set

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In mathematics, a set A {\displaystyle A} is inhabited if there exists an element a ∈ A {\displaystyle a\in A} . In classical mathematics, the property...

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Empty set

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spaces Inhabited set – Property of sets used in constructive mathematics Nothing – Complete absence of anything; the opposite of everything Power set – Mathematical...

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List of oldest continuously inhabited cities

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present-day cities by the time period over which they have been continuously inhabited as a city. The age claims listed are generally disputed. Differences in...

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Set theory

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Set theory is the branch of mathematical logic that studies sets, which can be informally described as collections of objects. Although objects of any...

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Venn diagram

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between sets, popularized by John Venn (1834–1923) in the 1880s. The diagrams are used to teach elementary set theory, and to illustrate simple set relationships...

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Axiom of regularity

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{\displaystyle (\exists y)[y\in x]} , which states that x is inhabited. Non-well-founded set theory Scott's trick Epsilon-induction Rieger 2011, pp. 175...

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Countable set

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mathematics, a set is countable if either it is finite or it can be made in one to one correspondence with the set of natural numbers. Equivalently, a set is countable...

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List of types of sets

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set Hyperarithmetical set Analytical set Analytic set, Coanalytic set Suslin set Projective set Inhabited set Multiset List of set identities and relations –...

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Algebra of sets

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algebra of sets, not to be confused with the mathematical structure of an algebra of sets, defines the properties and laws of sets, the set-theoretic operations...

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Naive set theory

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Naive set theory is any of several theories of sets used in the discussion of the foundations of mathematics. Unlike axiomatic set theories, which are...

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Semiring

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a semiring when 1 ω {\displaystyle 1_{\omega }} is replaced by any inhabited set whatsoever. The ideals on a semiring R {\displaystyle R} , with their...

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Universal set

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In set theory, a universal set is a set which contains all objects, including itself. In set theory as usually formulated, it can be proven in multiple...

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Infinite set

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In set theory, an infinite set is a set that is not a finite set. Infinite sets may be countable or uncountable. The set of natural numbers (whose existence...

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Finite set

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mathematics, particularly set theory, a finite set is a set that has a finite number of elements. Informally, a finite set is a set which one could in principle...

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Initial

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identifiable scene or story, while the figures in inhabited initials do not show a narrative. Figures in inhabited initials may be related to the contents of...

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Power set

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mathematics, the power set (or powerset) of a set S is the set of all subsets of S, including the empty set and S itself. In axiomatic set theory (as developed...

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Uncountable set

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mathematics, an uncountable set, informally, is an infinite set that contains too many elements to be countable. The uncountability of a set is closely related...

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Constructive set theory

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is least number existence for all inhabited detachable subsets. That said, the bare existence claim for the inhabited subset b := { z ∈ 1 ∣ P } ∪ { 1 }...

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The Skin I Live In

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The Skin I Live In (Spanish: La piel que habito) is a 2011 Spanish thriller and melodrama hybrid film written and directed by Pedro Almodóvar, starring...

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