A finite dimensional approach to Bramham’s approximation theorem
A finite dimensional approach to Bramham’s approximation theorem
Using pseudoholomorphic curve techniques from symplectic geometry, Barney Bramham proved recently that every smooth irrational pseudo-rotation of the unit disk is the limit, for the C 0 topology, of a sequence of smooth periodic diffeomorphisms. We give here a finite dimensional proof of this result that works in the case …