Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.
Updated
Claim. For every there is such that for all and all , every graph on vertices with more than edges contains every tree on vertices. The preprint states the conjecture with the tree's order as its parameter, more than edges forcing every -vertex tree, which is the site's statement with 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 at least a fixed positive fraction of and large in terms of that fraction, infinitely many for every . The instances with , and every instance with below the unstated , 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 ; 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.