List questions from relations

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Prove that the union of relations is an equivalence relation

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What is the term for equation in $y=f(x,y)$

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Prove or disprove that if $R_1$ and $R_2$ are equivalence relations, then $R_1 \circ R_2$ is also an equivalence relation

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141

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Is $\rho$ equivalence relation and, if not, specify all the ways to expand it to the equivalence relation.

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Do non-reflexive relations exist?

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Relation with each projection finite or cofinite

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"Is in the neighborhood of"-style relations

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List Question

Can functions satisfying these criteria exist?

Prove that the union of relations is an equivalence relation

What is the term for equation in $y=f(x,y)$

Prove or disprove that if $R_1$ and $R_2$ are equivalence relations, then $R_1 \circ R_2$ is also an equivalence relation

Is $\rho$ equivalence relation and, if not, specify all the ways to expand it to the equivalence relation.

Describing an equivalence class given a contained number.

Do non-reflexive relations exist?

Definition of symmetric relation

Reflexivity and symmetry on set {1,2,3}

How do I prove this relation is symmetric?

Relation with each projection finite or cofinite

Equivalence relations involving power sets

composition/power of relation

Function question need clarification (inverse, composition)

"Is in the neighborhood of"-style relations

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