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・ Axl Rotten
・ Axl Smith
・ Axle
・ Axle counter
・ Axle hitch
・ Axiom of countable choice
・ Axiom of dependent choice
・ Axiom of determinacy
・ Axiom of empty set
・ Axiom of Equity
・ Axiom of extensionality
・ Axiom of global choice
・ Axiom of infinity
・ Axiom of limitation of size
・ Axiom of Maria
Axiom of pairing
・ Axiom of power set
・ Axiom of projective determinacy
・ Axiom of real determinacy
・ Axiom of reducibility
・ Axiom of regularity
・ Axiom of union
・ Axiom S5
・ Axiom schema
・ Axiom schema of predicative separation
・ Axiom schema of replacement
・ Axiom schema of specification
・ Axiom Telecom
・ Axiom Verge
・ Axiom-man


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Axiom of pairing : ウィキペディア英語版
Axiom of pairing

In axiomatic set theory and the branches of logic, mathematics, and computer science that use it, the axiom of pairing is one of the axioms of Zermelo–Fraenkel set theory.
== Formal statement ==
In the formal language of the Zermelo–Fraenkel axioms, the axiom reads:
:\forall A \, \forall B \, \exists C \, \forall D \, (D \in C \iff (D = A \or D = B) )
or in words:
:Given any set ''A'' and any set ''B'', there is a set ''C'' such that, given any set ''D'', ''D'' is a member of ''C'' if and only if ''D'' is equal to ''A'' or ''D'' is equal to ''B''.
or in simpler words:
:Given two sets, there is a set whose members are exactly the two given sets.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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