CW complexes, homotopy groups and cofibrations
We begin this monograph by introducing the main objects of study in homotopy theory: CW complexes and their homotopy groups. The topological spaces (manifolds, polyhedra, real algebraic varieties, … ) that arise in geometric contexts are all CW complexes.
KeywordsTopological Space Homotopy Class Homotopy Type Homotopy Group Homotopy Theory
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