[11. Introduction to Fibrations] Poincaré Lemma and homotopic maps

These are the videos for the course "Introduction to Fibrations" that I teach at Rhur University Bochum during the Spring semester of 2021.

We define the De Rham cohomology as the cohomology of the De Rham complex. We show that star-like domains have trivial De Rham cohomology (the Poincaré Lemma) and that homotopic maps induce the same morphism in cohomology.