The stable second brick-Brauer-Thrall conjecture

Let AA be an algebra, and let θK0(projA)\theta\in K_0(\operatorname{proj} A). A module MmodAM\in\operatorname{mod} A is θ\theta-stable if θ(dimM)=0\theta(\underline{\dim}M)=0 and θ(dimN)<0\theta(\underline{\dim}N)<0 for every nonzero proper submodule NMN\subsetneq M. Call AA brick-infinite if it has infinitely many bricks up to isomorphism. Stable second brick-Brauer-Thrall conjecture. If AA is brick-infinite, then there exists some θK0(projA)\theta\in K_0(\operatorname{proj} A) such that there are infinitely many θ\theta-stable modules of the same dimension. This is presented as a stronger version of the second brick-Brauer-Thrall conjecture; the source gives no general resolution.

Sources & referencesView supporting material

Primary source

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

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