Introduction to concepts of category theory ― categories, functors, natural transformations, the Yoneda lemma, limits and colimits, adjunctive, monads ― revisits a broad range of mathematical examples from the categorical perspective. 2016 edition.

Derived from courses the author taught at Harvard and Johns Hopkins, this original book introduces the concepts of category theory ― categories, functors, natural transformations, the Yoneda lemma, limits and colimits, adjunctive, monads ― and other topics, revisiting a broad range of mathematical examples from the categorical perspective. Basic set theory and logic are the only prerequisites.