On maps which are the identity on the boundary

Albert Fathi

Comptes Rendus. Mathématique, Volume 355 (2017) p. 1022-1025

On the topology of the set of singularities of a solution to the Hamilton–Jacobi equation

Piermarco Cannarsa; Wei Cheng; Albert Fathi

Comptes Rendus. Mathématique, Volume 355 (2017) p. 176-180