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- Q5051849 subject Q8639124.
- Q5051849 abstract "In mathematics, the category Rel has the class of sets as objects and binary relations as morphisms.A morphism (or arrow) R : A → B in this category is a relation between the sets A and B, so R ⊆ A × B.The composition of two relations R: A → B and S: B → C is given by:(a, c) ∈ S o R if (and only if) for some b ∈ B, (a, b) ∈ R and (b, c) ∈ S.↑".
- Q5051849 thumbnail Relations_category.svg?width=300.
- Q5051849 wikiPageWikiLink Q1248241.
- Q5051849 wikiPageWikiLink Q130901.
- Q5051849 wikiPageWikiLink Q1630568.
- Q5051849 wikiPageWikiLink Q173740.
- Q5051849 wikiPageWikiLink Q1773982.
- Q5051849 wikiPageWikiLink Q1948412.
- Q5051849 wikiPageWikiLink Q205170.
- Q5051849 wikiPageWikiLink Q2518298.
- Q5051849 wikiPageWikiLink Q2795123.
- Q5051849 wikiPageWikiLink Q36161.
- Q5051849 wikiPageWikiLink Q395.
- Q5051849 wikiPageWikiLink Q4731385.
- Q5051849 wikiPageWikiLink Q5135347.
- Q5051849 wikiPageWikiLink Q5208525.
- Q5051849 wikiPageWikiLink Q5208527.
- Q5051849 wikiPageWikiLink Q541563.
- Q5051849 wikiPageWikiLink Q5887297.
- Q5051849 wikiPageWikiLink Q692689.
- Q5051849 wikiPageWikiLink Q719395.
- Q5051849 wikiPageWikiLink Q842620.
- Q5051849 wikiPageWikiLink Q846862.
- Q5051849 wikiPageWikiLink Q8639124.
- Q5051849 wikiPageWikiLink Q864475.
- Q5051849 wikiPageWikiLink Q919107.
- Q5051849 comment "In mathematics, the category Rel has the class of sets as objects and binary relations as morphisms.A morphism (or arrow) R : A → B in this category is a relation between the sets A and B, so R ⊆ A × B.The composition of two relations R: A → B and S: B → C is given by:(a, c) ∈ S o R if (and only if) for some b ∈ B, (a, b) ∈ R and (b, c) ∈ S.↑".
- Q5051849 label "Category of relations".
- Q5051849 depiction Relations_category.svg.