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Semigroupoid

In mathematics, a semigroupoid (also called semicategory, naked category or precategory) is a partial algebra that satisfies the axioms for a small category, except possibly for the requirement that there be an identity at each object. While this definition is due to Tilson, Exel has introduced a different definition, one in which there is no underlying…

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Yoneda lemma
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MathematicsPartial algebraCategorySemigroupsMonoids
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Semigroupoid

Nodes13
Edges12
Triples0
Avg. degree1.85
Density0.153846
Components1

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called objects mor semigroups set morphisms theory semicategory small semigroupoids things every write composition mathematics yoneda lemma semicategories category monoids

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