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Mirror symmetry for perverse schobers from birational geometry

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arxiv 1903.11226 v1 pith:5YFZLX3T submitted 2019-03-27 math.AG math.SG

classification math.AGmath.SG
keywords mirrorschoberscategoriesexamplesperversesheavessymmetryassociated
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Perverse schobers are categorical analogs of perverse sheaves. Examples arise from varieties admitting flops, determined by diagrams of derived categories of coherent sheaves associated to the flop: in this paper we construct mirror partners to such schobers, determined by diagrams of Fukaya categories with stops, for examples in dimensions 2 and 3. Interpreting these schobers as supported on loci in mirror moduli spaces, we prove homological mirror symmetry equivalences between them. Our construction uses the coherent-constructible correspondence and a recent result of Ganatra-Pardon-Shende to relate the schobers to certain categories of constructible sheaves. As an application, we obtain new mirror symmetry proofs for singular varieties associated to our examples, by evaluating the categorified cohomology operators of Bondal-Kapranov-Schechtman on our mirror schobers.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A class of perverse schobers in Geometric Invariant Theory

    math.AG 2019-08 accept novelty 7.0 of 10

    For any quasi-symmetric representation of a reductive group, the derived categories of GIT quotients form a perverse schober on the partial compactification of the stringy Kähler moduli space.

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