Cartesian Product characterization in Rel Category (Category of sets and relations) in simpler terms
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Direct products in the category Rel
24685
Expressing a Countable Union of Sets as the Countable Union of Disjoint Sets (e.g. Eliminating Duplicate Intersections)
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Uncountable subset with uncountable complement, without the Axiom of Choice
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Composition of equivalence relations
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Countable union of countable sets(ZF)
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Interior of cartesian product is cartesian product of interiors
128111
Why is a deductive closure an intersection of maximally consistent sets?
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What is the cartesian product of an empty set of sets?
13282
In the category $\mathbf{Set}$ is "the product of an empty set of sets a one-element set"?
18023
The direct sum $\oplus$ versus the cartesian product $\times$
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The dual version of trichotomy of cardinality without AC
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consistency of ZF\{Power Set axiom}
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Proof of Cartesian product intersection
9651
Cardinality of cartesian product of an infinite set with N
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Equivalence relations on classes instead of sets
3465
Equivalence relations and power sets.
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Product rule intuition