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arxiv: 1411.2772 · v2 · submitted 2014-11-11 · 🧮 math.AG

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Perverse Schobers

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keywords perversecasecategoricalschobersanalogcallcategoriesconcept
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We suggest a possibility for a categorical generalization of the concept of a perverse sheaf, in which vector spaces are replaced by triangulated categories. We call such hypothetical objects perverse Schobers and consider several examples, giving a natural but ad hoc definition in each case. In the simplest case (perverse sheaves on a disk with one possible singular point) we propose, as a categorical analog, the data of a spherical functor.

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Cited by 4 Pith papers

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    A construction inverts twists in adjunctions of stable infinity-categories, producing adjoints to the spherical adjunction inclusion and a walking spherical adjunction that classifies them.

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    Mediated triangle transport yields graded interaction polynomials I_Σ^gr from conifold state data, extending binary support structures for BPS and stability theory.

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    Provides the foundational finite-node categorical formalization layer for corrected perverse and mixed-Hodge-module packages in conifold degenerations with finitely many nodes.