Delphi.science

Existence of the q-colorability threshold for sparse random graphs

Source: github.com/pmaronow/q-colorability-palomar/tree/f31c25fbba9…

P. M. Aronow, Patrick Lopatto

Palomar Registrypalomar/PALOMAR-2026-11-04-000013Nov 4, 2026math.COscore 0

For every integer q at least 3, the formalization proves the existence of a limiting q-colorability threshold for sparse random graphs. A single constant alpha_q in [1/2, log(q)/log(q/(q-1))] gives the transition for the uniform model with floor(c n) edges and the transition at d = 2 alpha_q for the binomial model with edge probability d/n. For every fixed eta in (0,1), there is C > 0 such that, for all sufficiently large n, the first loss of q-colorability under independent uniform additions of unordered pairs of distinct vertices lies within C n (log n)^(-3/2) steps of deterministic…

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