Représentations relativement équivalentes et variétés riemanniennes isospectrales.
Restrictions of smooth functions to a closed subset
We first provide an approach to the conjecture of Bierstone-Milman-Pawłucki on Whitney’s problem on extendability of functions. For example, the conjecture is affirmative for classical fractal sets. Next, we give a sharpened form of Spallek’s theorem on flatness.
Restrictive metric regularity and generalized differential calculus in Banach spaces.
Résultats nouveaux a propos des conjectures de Lichnerowicz et de Carathéodory
Riemann map and holomorphic dynamics.
Rotation numbers for diffeomorphisms and flows