Billiard in a circle

𝐋𝐨𝐧𝐠𝐞𝐫 𝐯𝐞𝐫𝐬𝐢𝐨𝐧 𝐡𝐞𝐫𝐞: Billiard in a circle (long version)
500 non-interacting particles in a circular billiard. The segments are velocity vectors. Initially, all particles have slightly different positions and velocities. The billiard dynamics is integrable, therefore the dispersion grows at most linearly with time.
Uncompressed file: https://www.idpoisson.fr/berglund/cir...

For more information, see
https://images.math.cnrs.fr/Notre-uni...
https://www.idpoisson.fr/berglund/res...
https://www.idpoisson.fr/berglund/bil...

• #science_technology
• #billiards
• #dynamical_systems
• #integrable