books.google.de - Advanced undergraduate or beginning graduate students need a unified foundation for their study of geometry, analysis, and algebra. For the first time, this book uses categorical algebra to build such a foundation, starting from intuitive descriptions of mathematically and physically common phenomena...http://books.google.de/books/about/Sets_for_Mathematics.html?hl=de&id=h3_7aZz9ZMoC&utm_source=gb-gplus-shareSets for Mathematics
