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<p>We introduce a class of dg-algebras which generalize the classical Brauer graph algebras. They are constructed from mixed-angulations of surfaces and often admit a (relative) Calabi–Yau structure. We discovered these algebras through two very distinct routes, one involving perverse schobers whose stalks are cyclic quotients of the derived categories of relative Ginzburg algebras, and another involving deformations of partially wrapped Fukaya categories of surfaces. Applying the results of our previous work [<CitationRef CitationID="CR4">4</CitationRef>] , we describe the spaces of stability conditions on the derived categories of these algebras in terms of spaces of quadratic differentials.</p>

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Perverse schobers, stability conditions and quadratic differentials II: relative graded Brauer graph algebras

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  • 发表日期：

    2026年6月23日

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  • Merlin Christ,
  • Fabian Haiden,
  • Yu Qiu

摘要

We introduce a class of dg-algebras which generalize the classical Brauer graph algebras. They are constructed from mixed-angulations of surfaces and often admit a (relative) Calabi–Yau structure. We discovered these algebras through two very distinct routes, one involving perverse schobers whose stalks are cyclic quotients of the derived categories of relative Ginzburg algebras, and another involving deformations of partially wrapped Fukaya categories of surfaces. Applying the results of our previous work [4] , we describe the spaces of stability conditions on the derived categories of these algebras in terms of spaces of quadratic differentials.