%0 Journal Article %A Philippe Di Francesco %A Rinat Kedem %T $Q$-system Cluster Algebras, Paths and Total Positivity %J Symmetry, integrability and geometry: methods and applications %D 2010 %V 6 %U http://geodesic.mathdoc.fr/item/SIGMA_2010_6_a13/ %G en %F SIGMA_2010_6_a13