The complete, complete-bipartite, or 2-degenerate induced-subgraph conjecture

Let tw(G)\operatorname{tw}(G) denote the treewidth of GG. A graph is 22-degenerate if every induced subgraph has a vertex of degree at most 22. The complete, complete-bipartite, or 2-degenerate induced-subgraph conjecture. For every integer t1t\geq 1, every graph of sufficiently large treewidth has an induced subgraph of treewidth tt which is either complete, complete bipartite, or 22-degenerate. The source states that this strengthens the general sparse induced-subgraph conjecture, but the abstract says it has been refuted by Chudnovsky and Trotignon (2024).

Sources & referencesView supporting material

Primary source

Sepehr Hajebi, “Chordal graphs, even-hole-free graphs and sparse obstructions to bounded treewidth”, arXiv:2401.01299 (2025).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.