%0 Journal Article %A Fomin, Sergey %A Zelevinsky, Andrei %T Double Bruhat cells and total positivity %J Journal of the American Mathematical Society %D 1999 %P 335-380 %V 12 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-99-00295-7/ %R 10.1090/S0894-0347-99-00295-7 %F 10_1090_S0894_0347_99_00295_7