The characteristic-system-of-sets-of-lengths conjecture for finite abelian groups

Let HH be a transfer Krull monoid over a finite abelian group GG, and let B(G)\mathcal B(G) be the monoid of zero-sum sequences over GG. Write L(a)\mathsf L(a) for the set of factorization lengths of aa and

L(H)={L(a)aH},L(G)=L(B(G)).\mathcal L(H)=\{\mathsf L(a)\mid a\in H\},\qquad \mathcal L(G)=\mathcal L(\mathcal B(G)).

The system L(H)\mathcal L(H) depends only on GG. Characteristic-system-of-sets-of-lengths conjecture. If GG is a finite abelian group with D(G)4\mathsf D(G)\geq 4 and GG' is an abelian group satisfying

L(G)=L(G),\mathcal L(G)=\mathcal L(G'),

then GG and GG' are isomorphic. This inverse problem asks whether the system of sets of lengths determines the class group; the conjecture is stated for the range D(G)4\mathsf D(G)\geq 4, while the supplied text gives no resolution status.

Sources & referencesView supporting material

Primary source

Qinghai Zhong, “A characterization of finite abelian groups via sets of lengths in transfer Krull monoids”, arXiv:1711.05437 (2018).

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