Jiˇr´ı Ad´amek Horst Herrlich George E. Strecker
Abstract and Concrete Categories The Joy of Cats
Dedicated to Bernhard Banaschewski
The newest edition of the file of the present book can be downloaded from http://katmat.math.uni-bremen.de/acc
The authors are grateful for any improvements, corrections, and remarks, and can be reached at the addresses Jiˇr´ı Ad´amek, email:
[email protected] Horst Herrlich, email:
[email protected] George E. Strecker, email:
[email protected] All corrections will be awarded, besides eternal gratefulness, with a piece of delicious cake! You can claim your cake at the KatMAT Seminar, University of Bremen, at any Tuesday (during terms).
c 2004 Jiˇr´ı Ad´amek, Horst Herrlich, and George E. Strecker. Copyright Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is inclu