class inclusion

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class inclusion

set theory

Also known as: set inclusion

Learn about this topic in these articles:

distinguished from membership

In formal logic: Set theory
The relation of class inclusion, however (to be carefully distinguished from class membership), is transitive. A class x is said to be included in a class y (written x ⊆ y) if and only if every member of x is also a member of y. (This is not…
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