%0 Journal Article
%T Combinatorial Expressions for F-polynomials in Classical Types
%A Shih-Wei Yang
%J Mathematics
%D 2009
%I arXiv
%X We give combinatorial formulas for F-polynomials in cluster algebras of classical types in terms of the weighted paths in certain directed graphs. As a consequence we prove the positivity of F-polynomials in cluster algebras of classical types.
%U http://arxiv.org/abs/0912.2332v2