The stable brick conjecture

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Let AA be an algebra, and let θ∈K0(proj⁡A)\theta\in K_0(\operatorname{proj} A). A module M∈mod⁡AM\in\operatorname{mod} A is θ\theta-stable if θ(dim⁡‾M)=0\theta(\underline{\dim}M)=0 and θ(dim⁡‾N)<0\theta(\underline{\dim}N)<0 for every nonzero proper submodule N⊊MN\subsetneq M. Stable brick conjecture. If AA admits an infinite family of bricks of the same dimension, then for some θ∈K0(proj⁡A)\theta\in K_0(\operatorname{proj} A), there are infinitely many θ\theta-stable modules of the same dimension. The conjecture is known for all tame algebras and for algebras admitting a preprojective component in their Auslander-Reiten quiver, but remains open in general.

References

Primary source

Kaveh Mousavand and Charles Paquette, “Hom-orthogonal modules and brick-Brauer-Thrall conjectures”, arXiv:2407.20877 (2025).

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