TY - JOUR AU - Postnikov, Alexander AU - Speyer, David AU - Williams, Lauren TI - Matching polytopes, toric geometry, and the totally non-negative Grassmannian JO - Journal of Algebraic Combinatorics PY - 2009 SP - 173 EP - 191 VL - 30 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JAC_2009__30_2_a4/ LA - en ID - JAC_2009__30_2_a4 ER -