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- Groupoid abstract "In mathematics, especially in category theory and homotopy theory, a groupoid (less often Brandt groupoid or virtual group) generalises the notion of group in several equivalent ways. A groupoid can be seen as a:Group with a partial function replacing the binary operation;Category in which every morphism is invertible. A category of this sort can be viewed as augmented with a unary operation, called inverse by analogy with group theory.Oriented graph Special cases include:Setoids, that is: sets that come with an equivalence relation;G-sets, sets equipped with an action of a group G.Groupoids are often used to reason about geometrical objects such as manifolds. Heinrich Brandt (1927) introduced groupoids implicitly via Brandt semigroups.".
- Groupoid wikiPageExternalLink 0208108.pdf.
- Groupoid wikiPageExternalLink Groupoids.ps.
- Groupoid wikiPageExternalLink S0273-0979-06-01108-6.pdf.
- Groupoid wikiPageExternalLink weinstein.pdf.
- Groupoid wikiPageExternalLink groupoidsurvey.pdf.
- Groupoid wikiPageExternalLink hdaweb2.htm.
- Groupoid wikiPageExternalLink topgpds.html.
- Groupoid wikiPageExternalLink catalogue.asp?isbn=9780521803090.
- Groupoid wikiPageExternalLink models_final.pdf.
- Groupoid wikiPageExternalLink gt.html.
- Groupoid wikiPageExternalLink tr7abs.html.
- Groupoid wikiPageID "12543".
- Groupoid wikiPageRevisionID "603805696".
- Groupoid authorlink "Heinrich Brandt".
- Groupoid first "Heinrich".
- Groupoid hasPhotoCollection Groupoid.
- Groupoid id "fundamental+groupoid".
- Groupoid id "p/g045360".
- Groupoid last "Brandt".
- Groupoid title "Groupoid".
- Groupoid title "fundamental groupoid".
- Groupoid year "1927".
- Groupoid subject Category:Algebraic_structures.
- Groupoid subject Category:Category_theory.
- Groupoid subject Category:Homotopy_theory.
- Groupoid type AlgebraicStructures.
- Groupoid type Artifact100021939.
- Groupoid type Object100002684.
- Groupoid type PhysicalEntity100001930.
- Groupoid type Structure104341686.
- Groupoid type Whole100003553.
- Groupoid type YagoGeoEntity.
- Groupoid type YagoPermanentlyLocatedEntity.
- Groupoid comment "In mathematics, especially in category theory and homotopy theory, a groupoid (less often Brandt groupoid or virtual group) generalises the notion of group in several equivalent ways. A groupoid can be seen as a:Group with a partial function replacing the binary operation;Category in which every morphism is invertible.".
- Groupoid label "Catégorie groupoïde".
- Groupoid label "Groepoïde (categorietheorie)".
- Groupoid label "Groupoid".
- Groupoid label "Grupoide (teoria das categorias)".
- Groupoid label "Grupoide".
- Groupoid label "Gruppoid (Kategorientheorie)".
- Groupoid label "Gruppoide (teoria delle categorie)".
- Groupoid label "Группоид (теория категорий)".
- Groupoid sameAs Grupoid_(teorie_kategorií).
- Groupoid sameAs Gruppoid_(Kategorientheorie).
- Groupoid sameAs Grupoide.
- Groupoid sameAs Catégorie_groupoïde.
- Groupoid sameAs Gruppoide_(teoria_delle_categorie).
- Groupoid sameAs 준군.
- Groupoid sameAs Groepoïde_(categorietheorie).
- Groupoid sameAs Grupoide_(teoria_das_categorias).
- Groupoid sameAs m.0395f.
- Groupoid sameAs Q1196038.
- Groupoid sameAs Q1196038.
- Groupoid sameAs Groupoid.
- Groupoid wasDerivedFrom Groupoid?oldid=603805696.
- Groupoid isPrimaryTopicOf Groupoid.