books.google.com - Category theory provides a general conceptual framework that has proved fruitful in subjects as diverse as geometry, topology, theoretical computer science and foundational mathematics. Here is a friendly, easy-to-read textbook that explains the fundamentals at a level suitable for newcomers to the subject....http://books.google.com/books/about/An_Introduction_to_Category_Theory.html?id=VOCQUC_uiWgC&utm_source=gb-gplus-shareAn Introduction to Category Theory

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## An Introduction to Category TheoryBy Harold Simmons |