In 1964 Arnold constructed an example of instabilities for
nearly integrable systems and conjectured that generically this
phenomenon takes place. There has been big progress attacking this
conjecture in the past decade. Jointly with Ke Zhang we...
In 1964 Arnold constructed an example of instabilities for
nearly integrable systems and conjectured that generically this
phenomenon takes place. There has been big progress attacking this
conjecture in the past decade. Jointly with Ke Zhang we...
The Conley conjecture, recently established by Nancy Hingston,
asserts that every Hamiltonian diffeomorphism of a standard
symplectic 2n-torus admits infinitely many periodic points. While
this conjecture has been extended to more general closed...
This is a series of 3 talks on the topology of Stein manifolds,
based on work of Eliashberg since the early 1990ies. More
specifically, I wish to explain to what extent Stein structures are
flexible, i.e. obey an h-principle. After providing some...
The Arnold conjecture in Symplectic Topology states existence of
many fixed points for Hamiltonian symplectomorphisms of a compact
symplectic manifold. In my talk I will discuss an analogue of this
conjecture in Contact Topology, based on the notion...
We study particular solutions of the "inner equation" associated
to the splitting of separatrices on "generalized standard maps". An
exponentially small complete expression for their difference is
obtained. We also provide numerical evidence that...