%0 Journal Article %A Eleny-Nicoleta Ionel %A Thomas H. Parker %T The symplectic sum formula for Gromov–Witten invariants %J Annals of mathematics %D 2004 %P 935-1025 %V 159 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2004.159.935/ %R 10.4007/annals.2004.159.935 %G en %F 10_4007_annals_2004_159_935