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Poincaré Webinar Series on Optical Polarization and Related Phenomena
Monthly speakers explore topics derived from Henri Poincaré’s work on optical polarization and demonstrate applications of polarization techniques.
Join the series’ chairs and moderators – Thomas A. Germer, National Institute of Standards and Technology (USA); Jessica C. Ramella-Roman, Florida International University (USA); and Tatiana Novikova, École Polytechnique (France) – and be part of the discussion.

Tuesday, 26 January 2021, 5:00 am PT (1300 UTC): Poincaré and his Sphere(s)
Speaker: Bart Kahr
New York University (United States)

Description: Poincaré invented chaos theory, the mathematics of topology, and the Lorentz transformations as well as his polarization sphere. This discussion explores Poincaré’s path to his sphere through his work at the Bureau des Longitudes, an institution fully devoted to plotting points on spheres.

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