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math.CO2017
A Note on Upper Bounds for Some Generalized Folkman Numbers
Xiaodong Xu, Meilian Liang, Stanisław Radziszowski
We present some new constructive upper bounds based on product graphs for generalized vertex Folkman numbers. They lead to new upper bounds for some special cases of generalized ed…
math.CO2017
On the Nonexistence of Some Generalized Folkman Numbers
Xiaodong Xu, Meilian Liang, Stanisław Radziszowski
For an undirected simple graph , we write if and only if for every red-blue coloring of its vertices there exists a red or a blue . The g…