from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Plural form of groupoid.


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  • In modern mathematics, symmetries are usually encoded by groupoids; one also often upgrades groups to more structured objects such as

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  • The fact that every tranformation can be written as a translation and then a rotation or a reflection and then a rotation is a really cool result that introduces key ideas which you could easily think about in early highschool (and again suggests more advanced topics like groupoids).

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  • Groupoids (i.e. small categories in which all morphisms are isomorphisms) {For sets with a single binary operation, see 20N02; for topological groupoids, see 22A22, 58H05}

    Citizendium, the Citizens' Compendium - Recent changes [en]


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