%0 Journal Article %A Haiman, Mark %T Hilbert schemes, polygraphs and the Macdonald positivity conjecture %J Journal of the American Mathematical Society %D 2001 %P 941-1006 %V 14 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-01-00373-3/ %R 10.1090/S0894-0347-01-00373-3 %F 10_1090_S0894_0347_01_00373_3