Clique Decompositions in Random Graphs via Refined Absorption
arxiv(2024)
摘要
We prove that if p≥ n^-1/3+β for some β > 0, then
asymptotically almost surely the binomial random graph G(n,p) has a
K_3-packing containing all but at most n + O(1) edges. Similarly, we prove
that if d ≥ n^2/3+β for some β > 0 and d is even,
then asymptotically almost surely the random d-regular graph G_n,d has a
triangle decomposition provided 3 | d · n. We also show that G(n,p)
admits a fractional K_3-decomposition for such a value of p. We prove
analogous versions for a K_q-packing of G(n,p) with p≥
n^-1/q+0.5+β and leave of (q-2)n+O(1) edges, for
K_q-decompositions of G_n,d with (q-1) | d and d≥
n^1-1/q+0.5+β provided q| d· n, and for fractional
K_q-decompositions.
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