Common minimum in- and out-degree conjecture for cycle orientations

Let tt be a positive integer. An orientation of the cycle on tt vertices is obtained by assigning a direction to each edge of that cycle. Common degree conjecture. Every digraph with minimum out-degree and minimum in-degree at least t1t-1 contains every orientation of the cycle on tt vertices as a subdivision. This is proposed as a common strengthening of known results for dichromatic number and polynomial minimum-out-degree bounds; its status is not resolved in the source.

Sources & referencesView supporting material

Primary source

Chun-Hung Liu and Youngho Yoo, “Tight minimum degree conditions for apex-outerplanar minors and subdivisions in graphs and digraphs”, arXiv:2403.11470 (2026).

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