English

Intersection complex of any threefold as a Chow motive

Algebraic Geometry 2025-12-02 v1

Abstract

Motivated by the characterization of the intersection complex in terms of S..Morel's weight truncations, we introduced an object EMXFEM^{F}_{X} in the setting of motivic sheaves for certain schemes XX and weight profiles FF. In this article, we show that when XX is any threefold, this object satisfies Wildeshaus's characterization of a motivic intersection complex. In particular, we demonstrate that the construction is a suitably functorial Chow motive lifting the motivic intersection complex for an arbitrary threefold.

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Cite

@article{arxiv.2512.01297,
  title  = {Intersection complex of any threefold as a Chow motive},
  author = {Shruti Rastogi and Vaibhav Vaish},
  journal= {arXiv preprint arXiv:2512.01297},
  year   = {2025}
}

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37 pages