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Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.

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Claim. For every γ>0\gamma>0 there is n0n_0 such that for all n≥n0n\ge n_0 and all k≥γnk\ge\gamma n, every graph on nn vertices with more than k−12n\frac{k-1}2n edges contains every tree on k+1k+1 vertices. The preprint states the conjecture with the tree's order as its parameter, more than (k−2)n/2(k-2)n/2 edges forcing every kk-vertex tree, which is the site's statement with kk shifted by one; its abstract also derives, as a corollary, a solution of a problem of Erdős and Graham on the multicolor Ramsey numbers of trees.

Covers. The instances with kk at least a fixed positive fraction of nn and nn large in terms of that fraction, infinitely many for every γ\gamma. The instances with k=o(n)k=o(n), and every instance with nn below the unstated n0n_0, are outside this claim; the full statement is settled by the accepted claim page [[problems/extremal_graph_theory/E0548/claims/2026_09_03_adamczewski|Adamczewski 2026]].

Depends on. Nothing in this wiki.

Standing. Claimed, not accepted. Bruce Reed and Maya Stein, The Erdős--Sós conjecture in dense graphs, arXiv:2609.05417 (the library card pages Theorem 2 and Corollary 4), v1 4 September 2026 (the date this page is named by), v2 8 September 2026, under the CC BY 4.0 license; no journal version is known. The site's commentary, last edited 7 September 2026, records the result as [ReSt26], but the site's label credits GPT-6 Astra with the full proof and is not an acceptance of this paper; nothing is refereed or formalized. The companion preprint of the same authors, The extremal cases of the Erdős--Sós conjecture (arXiv:2609.05411, [ReSt26b] on the site), proves the conjecture for host graphs with the minimum edge count that contain a subgraph of minimum degree at least (1−μ)k(1-\mu)k; it restricts the host graph, settles no instance of the statement, and has no page.

Read depth. The arXiv abstract and version record were read; the paper's body was not read, and nothing is independently reviewed in this corpus.