Séminaires : Phd Seminar - Séminaire des doctorant.e.s

Le séminaire des doctorant.e.s est l'occasion pour les doctorant.e.s de présenter des résultats et des problématiques dignes d'intérêt devant un public de non-spécialistes. L'ambiance y est informelle ; poser des questions naïves est encouragé, et les questions moins naïves sont bienvenues dans la mesure où elles n'entravent pas le bon déroulement de l'exposé.

Chaque jeudi à 18h, en alternance entre Jussieu et Sophie Germain.

The PhD seminar is an opportnuity for PhD students to present results and topics worthy of interest in front of a non-specialist audience. The mood is informal ; asking naive questions is highly encouraged and less naive questions are also welcomed, as long as they don't intefere with the smoothness of the talk.

Every Thursday at 6pm, alternating between Jussieu and Sophie Germain.

The Boltzmann equation provides a statistical description of a typical particle in a dilute gas, a middle ground between a microscopic model tracking every particle and the macroscopic models of fluid mechanics. A key hypothesis in its derivation is the puzzling assumption of molecular chaos: It claims that any two gas particles are statistically independent before they interact, disregarding any previous interaction that should make them correlated.

In 1956, Mark Kac proposed to prove molecular chaos by starting from a simpler probabilistic model of N interacting particles, and showing that the particles indeed become approximately independent in the large N limit. This limiting process is now known as propagation of chaos, and this (still partially open) question as Kac's program.