Computational Category Theory - An implementation of concepts and constructions from category theory in the functional programming language Standard ML. Documentation and code..
CT Category Theory - Section of the e-print arXiv dealing with category theory, including such topics as: enriched categories, topoi, abelian categories, monoidal categories, homological algebra..
A Gentle Introduction to Category Theory - Lecture notes by Maarten M. Fokkinga introducing some important notions from category theory, in particular adjunctions. Proofs are given in a calculational style, and the (few) examples are taken from algorithmics. The text is a long PostScript file..
Groupoid Home Page - Maintained by Birant Ramazan. Address book, open problems, meetings, pictures, other resources..
Toposes, Triples and Theories - By Michael Barr and Charles Wells, 1983. A revised and corrected version is now available free for downloading. Formats: DVI, PDF, PostScript..
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