Equivalence of left, partitionable and tensor-action convergence for uniform hypergraphs

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Let Hn=(V(Hn),E(Hn))H_n=(V(H_n),E(H_n)) be a sequence of rr-uniform hypergraphs, and let A(Hn)A(H_n) denote the normalized adjacency tensors. Left-convergence is convergence of homomorphism densities, and partitionable convergence is the hypergraph convergence notion defined through branching partitions.

Convergence-equivalence conjecture. Left-convergence, partitionable convergence, and action convergence of the (r−1)(r-1)-action of the sequence

A(Hn)∣V(Hn)∣\frac{A(H_n)}{|V(H_n)|}

of normalized adjacency tensors are equivalent.

Partitionable convergence is already known in the source to imply left-convergence, while the conjecture asserts equivalence with both left-convergence and the (r−1)(r-1)-action convergence of normalized adjacency tensors.

References

Primary source

Giulio Zucal, “Action convergence of general hypergraphs and tensors”, arXiv:2308.00226 (2025).

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