Universal set
In set theory, a universal set is a set that contains all of the objects in the theory, including itself. In set theory as usually formulated, it can be proven in multiple ways that a universal set does not exist.
In set theory, a universal set is a set that contains all of the objects in the theory, including itself. In set theory as usually formulated, it can be proven in multiple ways that a universal set does not exist.
In set theory, a universal set is a set that contains all of the objects in the theory, including itself. In set theory as usually formulated, it can be proven in multiple ways that a universal set does not exist.
Source: Wikipedia "Universal set" · CC BY-SA 4.0
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