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math.CT2007★ 71 cited
Icons
Stephen Lack
Categorical orthodoxy has it that collections of ordinary mathematical structures such as groups, rings, or spaces, form categories (such as the category of groups); collections of…
math.CT2007★ 156 cited
A 2-categories companion
Stephen Lack
This paper is a rather informal guide to some of the basic theory of 2-categories and bicategories, including notions of limit and colimit, 2-dimensional universal algebra, formal…