""Contents""; ""Preface""; ""List of Speakers""; ""A Hofer-like metric on the group of symplectic diffeomorphisms""; ""C0-rigidity of Poisson brackets""; ""Six questions, a proposition and two pictures on hofer distance for hamiltonian diffeomorphisms on surfaces""; ""Order structure on action minimizing orbits""; ""Loops in the Hamiltonian group: A survey""; ""The group of Hamiltonian homeomorphisms and continuous hamiltonian flows""