List questions from relations

Published on 26 Jan 2015 - 14:52

49

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If $|B\times A| = 15$ ,evaluate: $|A\cap B|$

Published on 27 Jan 2015 - 11:35

3.9k

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Prove that $f$ is NOT surjective

Published on 27 Jan 2015 - 11:42

5.5k

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Is an irreflexive and transitive set an anti symmetric set?

Published on 28 Jan 2015 - 14:28

107

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What's the term for antisymmetry where equal elements are not in the relation?

Published on 28 Jan 2015 - 22:20

90

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Recurrence Relations Closed Form

Published on 03 Apr 2026 - 2:41

732

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Counting relations question

Published on 29 Jan 2015 - 11:04

597

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Mapping relations

Published on 29 Jan 2015 - 18:44

76

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For what $z\in\mathbb{N}$ is "$x\equiv y\iff xyz$ is a square" an equivalence relation?

Published on 03 Apr 2026 - 11:42

1k

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xor of three relations using Relation Algebra operations

Published on 25 Mar 2026 - 6:08

158

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A counterexample for an equation between arbitrary relations

Published on 25 Mar 2026 - 7:47

81

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Proving $|S/R^2|=\aleph$ , $(x_1,x_2)S(y_1,y_2)\iff x_1^2-x_2=y^2_1-y_2$

Published on 03 Apr 2026 - 10:02

191

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How to interpret the following function?

Published on 04 Feb 2015 - 17:11

4.8k

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How are ∈ and ⊂ defined to be relations?

Published on 06 Feb 2015 - 20:08

72

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Clarification regarding domain definition

Published on 06 Feb 2015 - 20:21

List Question

A relation on the set with four elements which is reflexive, but not transitive

If $|B\times A| = 15$ ,evaluate: $|A\cap B|$

Prove that $f$ is NOT surjective

Is an irreflexive and transitive set an anti symmetric set?

What's the term for antisymmetry where equal elements are not in the relation?

Recurrence Relations Closed Form

Counting relations question

Mapping relations

For what $z\in\mathbb{N}$ is "$x\equiv y\iff xyz$ is a square" an equivalence relation?

xor of three relations using Relation Algebra operations

A counterexample for an equation between arbitrary relations

Proving $|S/R^2|=\aleph$ , $(x_1,x_2)S(y_1,y_2)\iff x_1^2-x_2=y^2_1-y_2$

How to interpret the following function?

How are ∈ and ⊂ defined to be relations?

Clarification regarding domain definition

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