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Kernels of categorical resolutions of nodal singularities

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arxiv 2209.12853 v2 pith:QCR33YBC submitted 2022-09-26 math.AG

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keywords nodalcategoricalsingularitiesderivedkernelobjectresolutionahler
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abstract

In this paper we study derived categories of nodal singularities. We show that for all nodal singularities there is a categorical resolution whose kernel is generated by a $2$ or $3$-spherical object, depending on the dimension. We apply this result to the case of nodal cubic fourfolds, where we describe the kernel generator of the categorical resolution as an object in the bounded derived category of the associated degree six K3 surface. This paper originated from one of the problem sessions at the Interactive Workshop and Hausdorff School "Hyperk\"ahler Geometry", Bonn, September 6-10, 2021.

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Cited by 1 Pith paper

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

  1. Categorical absorptions of singularities and degenerations

    math.AG 2022-07 unverdicted novelty 6.0 of 10

    Introduces categorical absorption of singularities for projective varieties with isolated ordinary double points and shows the smooth part extends over smoothings.

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