The τ-perpendicular subcategory inheritance conjecture

Let Λ\Lambda be a finite-dimensional algebra. Let WmodΛ\mathcal W\subseteq\mathsf{mod}\Lambda be a τ\tau-perpendicular subcategory of modΛ\mathsf{mod}\Lambda, and let VW\mathcal V\subseteq\mathcal W be a wide subcategory of W\mathcal W. Inheritance conjecture. Then V\mathcal V is a τ\tau-perpendicular subcategory of modΛ\mathsf{mod}\Lambda if and only if V\mathcal V is a τ\tau-perpendicular subcategory of W\mathcal W. The converse to the preceding composition result is known in several cases, including τ\tau-tilting finite algebras and hereditary algebras; the conjecture proposes that it holds for arbitrary finite-dimensional algebras.

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Primary source

Aslak Bakke Buan and Eric J. Hanson, “τ-perpendicular wide subcategories”, arXiv:2107.01141 (2024).

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