Affiliation: | (1) Department of Mathematics, S.U.N.Y. at Stony Brook, 11794 Stony Brook, N.Y., (USA);(2) Laboratoire associé au C.N.R.S. n° 169, Centre de Mathématiques de l'Ecole Polytechnique, Plateau de Palaiseau, F-91128 Palaiseau cedex, France;(3) Department of Mathematics, S.U.N.Y. at Stony Brook, 11794 Stony Brook, N.Y., (USA);(4) I.H.E.S., 35, route de Chartres, F-91440 Bures sur Yvette, France |