Titlebook: Elements of Homotopy Theory; George W. Whitehead Textbook 1978 The Editor(s) (if applicable) and The Author(s), under exclusive license to

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Textbook 1978oach will make homotopy theory accessible to workers in a wide range of other subjects-subjects in which its impact is beginning to be felt. It is a consequence of this approach that the order of development is to a certain extent historical. Indeed, if the order in which the results presented here