The maximal-length minimal zero-sum sequence conjecture

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Let GG be a finite abelian group, and call a sequence over GG a minimal zero-sum sequence if its sum is zero and no nonempty proper subsum is zero. Write D(G)\mathsf D(G) for the Davenport constant, the maximal length of a minimal zero-sum sequence over GG. The maximal-length minimal zero-sum sequence conjecture. If GG is neither cyclic nor an elementary 22-group, then for every minimal zero-sum sequence U=g1…gℓU=g_1\ldots g_\ell with ∣U∣=ℓ=D(G)|U|=\ell=\mathsf D(G), there exist k∈Nk\in\mathbb N and minimal zero-sum sequences U1,…,Uk,V1,…,Vk+1U_1,\ldots,U_k,V_1,\ldots,V_{k+1}, whose terms belong to {g1,…,gℓ,−g1,…,−gℓ}\{g_1,\ldots,g_\ell,-g_1,\ldots,-g_\ell\}, such that

U1…Uk=V1…Vk+1.U_1\ldots U_k=V_1\ldots V_{k+1}.

A positive answer gives a structural description of sets of lengths with maximal elasticity in transfer Krull monoids over finite abelian groups. The supplied text does not state whether this conjecture has been resolved.

References

Primary source

Aqsa Bashir, Alfred Geroldinger and Qinghai Zhong, “On a zero-sum problem arising from factorization theory”, arXiv:2007.10094 (2020).

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