自反关系

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。

集合X，以及其上的二元关系R，若满足：∀a∈X，有aRa。则称二元关系R是自反的，或称R具有自反性，或称R为自反关系。

单词	Reflexive relation
释义	Reflexive relation 中文百科自反关系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。集合X，以及其上的二元关系R，若满足：∀a∈X，有aRa。则称二元关系R是自反的，或称R具有自反性，或称R为自反关系。英语百科 Reflexive relation 自反关系 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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Reflexive relation