DeMarco–Kahn upper tail conjecture for strictly balanced graphs and dense regimes

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Let HH be a graph, let mHm_H denote its appearance-threshold parameter, and let the DeMarco–Kahn upper tail conjecture be the assertion that the upper-tail estimate stated above holds. A graph is strictly balanced when the relevant density parameter is strictly maximized by HH rather than by a proper subgraph. DeMarco–Kahn's restricted upper tail conjecture. The DeMarco–Kahn upper tail conjecture is true for every strictly balanced graph HH. Moreover, for every fixed γ>0\gamma>0, it is true under the additional assumption

p⩾n−1/mH+γ.p\geqslant n^{-1/m_H+\gamma}.

These are proposed restricted regimes in which the false general conjecture may still hold. The paper presents them as open problems rather than proving them.

References

Primary source

Matas Šileikis and Lutz Warnke, “A counterexample to the DeMarco-Kahn Upper Tail Conjecture”, arXiv:1809.09595 (2019).

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