Homotopy II (2021-2022): Motivation for model categories

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Analogies between different homotopy theories: topological spaces, simplicial sets, chain complexes. Motivation for the definition of model categories. (Co)fibrations vs. injections/surjections. Definition of model categories. (Sections 1.1 and 1.2 of the lecture notes.)

Due to the COVID pandemic, the first two lectures were held online in 2021-2022.
  1. Najib Idrissi-Kaïtouni
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