# Category Theory to Yoneda's Lemma

 Title: Category Theory to Yoneda's Lemma Author: Greg O'Keefe Submission date: 2005-04-21 Abstract: This development proves Yoneda's lemma and aims to be readable by humans. It only defines what is needed for the lemma: categories, functors and natural transformations. Limits, adjunctions and other important concepts are not included. Change history: [2010-04-23]: The definition of the constant equinumerous was slightly too weak in the original submission and has been fixed in revision 8c2b5b3c995f. BibTeX: @article{Category-AFP, author = {Greg O'Keefe}, title = {Category Theory to Yoneda's Lemma}, journal = {Archive of Formal Proofs}, month = apr, year = 2005, note = {\url{https://isa-afp.org/entries/Category.html}, Formal proof development}, ISSN = {2150-914x}, } License: GNU Lesser General Public License (LGPL)