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math.CO2017★ 1 cited
Nowhere-zero -flow of graphs with small independence number
Jiaao Li, Rong Luo, Yi Wang
Tutte's -flow conjecture states that every -edge-connected graph admits a nowhere-zero -flow. In this paper, we characterize all graphs with independence number at most $4…
math.CO2017
Total positivity of Narayana matrices
Yi Wang, Arthur L. B. Yang
We prove the total positivity of the Narayana triangles of type and type , and thus affirmatively confirm a conjecture of Chen, Liang and Wang and a conjecture of Pan and Ze…