Errata to Model Categories
نویسنده
چکیده
1. In the intro, I need to thank Georges Maltsiniotis for finding so many errors. Replace last paragraph of p. xii with the following: I would like to acknowledge the help of several people in the course of writing this book. I went from knowing very little about model categories to writing this book in the course of about two years. This would not have been possible without the patient help of Phil Hirschhorn, Dan Kan, Charles Rezk, Brooke Shipley, and Jeff Smith, experts in model categories all. I wish to thank John Palmieri for countless conversations about the material in this book. Thanks are also due Gaunce Lewis for help with compactly generated topological spaces, and Mark Johnson for comments on early drafts of this book. I also thank Georges Maltsiniotis for his careful reading of the first edition of this book. And I wish to thank my family, Karen, Grace, and Patrick, for the emotional support so necessary in the frustrating enterprise of writing a book. 2. On p. 2, l. -6, the definition 1.1.1 (2) of functorial factorization is not as strong as I intended, nor as strong as the small object argument implies. Here is the fix: Given a category C, we can form the category MapC whose objects are morphisms of C and whose morphisms are commutative squares. Note that there are domain and codomain functors d, c : MapC −→ C.
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