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Additional
2-morphism
English Wikipedia - The Free Encyclopedia
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2-category
In
category theory
, a
2-category
is a
category
with "morphisms between morphisms"; that is, where each
hom-set
itself carries the structure of a category. It can be formally defined as a category
enriched
over
Cat
(the
category of categories and functors
, with the
monoidal
structure given by
product of categories
).
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