On the Chromatic Number of Random Regular Graphs
summary
Determines the chromatic number of random d‑regular graphs for almost all d by pinning explicit upper and lower bounds and showing an explicit integer D_k that matches the chromatic number for a sequence of d with asymptotic density ~0.614. Uses the second moment method on good k‑colorings and overlap matrices, works in the configuration model and planted model, controls cluster sizes (typical clusters vs expected), gets an unresolved ambiguity only on intervals of length ≈0.386, and proves a condensation phase transition.
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