functor (plural functors)
(grammar) A function word.
(object-oriented programming) A function object.
(category theory) A category homomorphism; a morphism from a source category to a target category which maps objects to objects and arrows to arrows, in such a way as to preserve domains and codomains (of the arrows) as well as composition and identities.
Hyponym: endofunctor
In the category of categories, , the objects are categories and the morphisms are functors.
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Source: Wiktionary
29 April 2025
(noun) a drop in stock market activity or stock prices following a period of increases; “market runups are invariably followed by a correction”
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