自反关系 Reflexive relation
（重定向自Antireflexive relation）
自反关系是在逻辑学和数学中一种特殊的二元关系，这样的二元关系被称为自反的，也被称为具有自反性。
Antireflexive relation
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英语百科
Reflexive relation 自反关系
（重定向自Antireflexive relation）
In mathematics, a binary relation R over a set X is reflexive if every element of X is related to itself.
In mathematical notation, this is:
An example of a reflexive relation is the relation "is equal to" on the set of real numbers, since every real number is equal to itself. A reflexive relation is said to have the reflexive property or is said to possess reflexivity.
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