Lecture 3 Homotopy equivalence and homotopy extension

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00:00 - Introduction
3:25 - Homotopy equivalence
8:44 - Deformation retractions
16:55 - Homotopy Extension
37:40 - Consequences of Homotopy Extension
48:48 - Attaching maps only depend on homotopy class
  1. Gabriel Islambouli
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Thank you very much for your effort. I use this course beside reading Hatcher to recall theory.

GiacomoPhilipp