This lecture covers the combinatorial approach to group theory, focusing on group presentations, free products, and subgroup generation. Topics include Seifert-van Kampen theorem, free groups, and examples of subgroup generation.
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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
