The converse characterization for 1-dimensional bipartite hypergraphs

Let H\mathcal{H} be a 1-dimensional bipartite hypergraph with

pd(H)V(H)2.\operatorname{pd}(\mathcal{H})\leq |V(\mathcal{H})|-2.

Converse characterization conjecture. Then pd(H)=V(H)=2\operatorname{pd}(\mathcal{H})=|V(\mathcal{H})|=2 if and only if H\mathcal{H} satisfies ()(\sharp). The authors are asking whether this gives a combinatorial characterization of 1-dimensional bipartite hypergraphs of projective dimension V(H)2|V(\mathcal{H})|-2; the statement is presented as a potential characterization and no resolution is given.

Sources & referencesView supporting material

Primary source

Kuei-Nuan Lin and Paolo Mantero, “Hypergraphs with high projective dimension and 1-dimensional Hypergraphs”, arXiv:1603.01331 (2016).

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