The codegree conjecture for spanning spheres in uniform hypergraphs
The codegree conjecture for spanning spheres in uniform hypergraphs
Let , and let be an -graph on vertices. For a set of vertices, its codegree is the number of edges containing it, and a tight component is an equivalence class under the transitive closure of the relation that two edges satisfy when they meet in vertices.
Higher-dimensional spanning-sphere conjecture. If comprises a single tight component and every set of vertices contained in an edge of is contained in at least edges, then contains a spanning copy of the -dimensional sphere .
This conjecture is motivated by a construction showing that a spanning tight component alone does not force a spanning surface. It predicts a codegree threshold of , independent of the dimension, but no resolution is supplied.
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Sources & referencesView supporting material
Primary source
Agelos Georgakopoulos, John Haslegrave, Richard Montgomery and Bhargav Narayanan, “Spanning surfaces in 3-graphs”, arXiv:1808.06864 (2018).
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