This lecture covers the Seifert van Kampen theorem, homotopy, and the repair of premie rectangles. It explains the concept of rat tracks, basic laut, and horisontal trongen, providing a detailed analysis of the theorem.
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On étudie des notions de topologie générale: unions et quotients d'espaces topologiques; on approfondit les notions de revêtements et de groupe fondamental,et d'attachements de cellules et on démontre