Homotopy theory

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This book develops abstract homotopy theory from the categorical perspective with a particular focus on examples. Part I discusses two competing perspectives by which one typically first encounters homotopy (co)limits: either as derived functors definable when the appropriate di…

Cover; Half title; Series; Title; Copyright; Dedication; Epigraph; Contents; Preface; Prerequisites; Notational Conventions; Acknowledgments; Part I Derived functors and homotopy (co)limits; 1 All concepts are Kan extensions; 1.1 Kan extensions; 1.2 A formula; 1.3 Pointwise Kan …