https://philippelefloch.org/2026/09/29/seminar-on-mathematical-general-relativity-2026-2027/Mathematical general relativity, compressible fluids, and moreen2026-09-29T06:04:19+00:00Seminar on Mathematical General Relativity – 2026–2027MATH GR, laboratoire-jacques-louis-lions, Sorbonne Université