Critical-excess conjecture for distinguishable tree assignments

Let HH be a kk-weakly-partition-connected hypergraph on tt vertices. A tree assignment of HH assigns a tree to every hyperedge occurrence, and the resulting labelled graph has a kk-distinguishable tree assignment when its kk-tree decomposition is uniquely determined by its signature.

Critical-excess conjecture. If

eE(H)(e1)=k(t1),\sum_{e\in E(H)}(|e|-1)=k(t-1),

then HH has a kk-distinguishable tree assignment.

This is presented as the natural repair of the refuted literal conjecture, after adding the missing critical-excess equality. The supplied text does not establish whether this repaired statement is proved or remains open.

Sources & referencesView supporting material

Primary source

Yutong Zhang and Yaoran Yang, “Excess Obstructions and Star-Isolated Certificates for the Hypergraph Nash–Williams–Tutte Conjecture”, arXiv:2605.21961 (2026).

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