Explore the third part of Pierre Dehornoy's lecture on contact flows and Birkhoff sections, delivered during the "Anosov Dynamics" thematic meeting at the Centre International de Rencontres Mathématiques in Marseille, France. Delve into advanced mathematical concepts as Dehornoy continues his exploration of these topics. Access this comprehensive recording through CIRM's Audiovisual Mathematics Library, which offers enhanced features such as chapter markers, keywords, enriched content with abstracts and bibliographies, and a multi-criteria search function. Gain valuable insights into this specialized area of mathematics from a renowned expert in the field.