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Bounds on Threshold Probabilities for Coloring Properties of Random Hypergraphs

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We study the threshold probability for the property of existence of a special-form $$r$$ ⁠-⁠coloring for a random $$k$$ ⁠-⁠uniform hypergraph in the $$H(n,k,p)$$ binomial model. A parametric set of $$j$$… Click to show full abstract

We study the threshold probability for the property of existence of a special-form $$r$$ ⁠-⁠coloring for a random $$k$$ ⁠-⁠uniform hypergraph in the $$H(n,k,p)$$ binomial model. A parametric set of $$j$$ ⁠-⁠chromatic numbers of a random hypergraph is considered. A coloring of hypergraph vertices is said to be $$j$$ ⁠-⁠proper if every edge in it contains no more than $$j$$ vertices of each color. We analyze the question of finding the sharp threshold probability of existence of a $$j$$ ⁠-⁠proper $$r$$ ⁠-⁠coloring for $$H(n,k,p)$$ . Using the second moment method, we obtain rather tight bounds for this probability provided that $$k$$ and $$j$$ are large as compared to $$r$$ .

Keywords: coloring properties; threshold probabilities; properties random; bounds threshold; probabilities coloring; random hypergraphs

Journal Title: Problems of Information Transmission
Year Published: 2022

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