The indecomposable-real-element conjecture for superunitary regions

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Let A\mathcal{A} be a cluster algebra with a good basis B\mathfrak{B}, and let Bir\mathfrak{B}_{ir} be the subset of indecomposable real elements, where an element bb is real if b2∈Bb^2\in\mathfrak{B} and indecomposable if every factorization b=cdb=cd with c,d∈Bc,d\in\mathfrak{B} has an invertible factor. For b∈Bb\in\mathfrak{B}, write fbf_b for its associated function. The indecomposable-real-element conjecture. The B\mathfrak{B}-superunitary region is the subset of A(R>0)\mathcal{A}(\mathbb{R}_{>0}) on which fb≥1f_b\geq1 for every b∈Birb\in\mathfrak{B}_{ir}:

AB(R≥1)={p∈A(R>0)∣fb(p)≥1 for every b∈Bir}.\mathcal{A}_{\mathfrak{B}}(\mathbb{R}_{\geq1})=\{p\in\mathcal{A}(\mathbb{R}_{>0})\mid f_b(p)\geq1\text{ for every }b\in\mathfrak{B}_{ir}\}.

This would imply equality with the ordinary superunitary region whenever the indecomposable real elements are precisely the cluster variables. The supplied text gives no resolution.

References

Primary source

Emily Gunawan and Greg Muller, “Superunitary regions of cluster algebras”, arXiv:2208.14521 (2022).

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