%0 Journal Article %A Per Alexandersson %A Jim Haglund, %A George Wang %T From Generalized Permutahedra to Grothendieck Polynomials via Flow Polytopes %J Séminaire lotharingien de combinatoire %D 2018 %V 80B %I mathdoc %U http://geodesic.mathdoc.fr/item/SLC_2018_80B_a89/ %F SLC_2018_80B_a89