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Lecture
Are you an EPFL student looking for a semester project?
Work with us on data science and visualisation projects, and deploy your project as an app on top of Graph Search.
This lecture explores examples from Hatcher's book to demonstrate the use of the homotopy extension property for CW pairs, showing how certain topological spaces are homotopy equivalent. By examining the sphere S2 and the torus with attached discs, the instructor illustrates how to contract subcomplexes to obtain homotopy equivalences between different spaces.