%0 Journal Article %A Polterovich, Leonid %T Geometry on the group of Hamiltonian diffeomorphisms %J Documenta mathematica %D 1998 %P 401-410 %V ICM Berlin 1998, Vol. II %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_1998__S8__a43/ %G en %F DOCMA_1998__S8__a43