85 citations · 85 across the 3 of their papers we have counts for
3 papers
math.CO2005
Graphical condensation of plane graphs: a combinatorial approach
Weigen Yan, Yeong-Nan Yeh, Fuji Zhang
The method of graphical vertex-condensation for enumerating perfect matchings of plane bipartite graph was found by Propp (Theoret. Comput. Sci. 303(2003), 267-301), and was genera…
math.CO2005★ 85 cited
Log-concavity and LC-positivity
Yi Wang, Yeong-Nan Yeh
A triangle of nonnegative numbers is LC-positive if for each , the sequence of polynomials is -log-concave. It is double…
math.CO2004
On various restricted sumsets
Zhi-Wei Sun, Yeong-Nan Yeh
For finite subsets A_1,...,A_n of a field, their sumset is given by {a_1+...+a_n: a_1 in A_1,...,a_n in A_n}. In this paper we study various restricted sumsets of A_1,...,A_n with…