Uploaded January 2026 | Updated September 2026, 3 weeks ago

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After briefly reviewing some of the high-precision experimental confirmations of General Relativity (GR), the talk will discuss some open issues concerning both physical and mathematical aspects of GR, notably:
. Tantalizing links between GR and Yang-Mills theory ;
. Links between Einstein equations and Navier-Stokes equations;
. Emergence of hidden symmetry structures near cosmological singularities;
. Peeling properties and symmetry structures near infinity;
. Skeletonization of Black Holes as point masses;
. Scarcity of viable extensions of GR.

Thibault Damour (IHES)

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