CW Pairs: Homotopy Extension Property

In course

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Description

This lecture discusses how CW pairs satisfy the homotopy extension property, showing that if (X, A) is a CW pair, then X union A is a deformation retract of X times I. The proof involves retractions and homotopy extension properties.

Instructor

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Official source

https://mediaspace.epfl.ch/media/0_aowvu9bd

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