English

Comparison of the two notions of characteristic cycles

Algebraic Geometry 2023-12-18 v1

Abstract

Given a constructible sheaf FF on a complex manifold, Kashiwara-Schapira defined the notion of singular support and characteristic cycle of FF. On the other hand for a Zariski constructible \'{e}tale sheaf FF on an algebraic variety XX, Beilinson defined the notion of singular support of FF and Saito defined the notion of characteristic cycle of FF. In this article we compare these notions and prove that they agree in a suitable sense. In the appendix we discuss extension of the notions of singular support and characteristic cycles developed by Umezaki-Yang-Zhao and Barrett.

Keywords

Cite

@article{arxiv.2312.09945,
  title  = {Comparison of the two notions of characteristic cycles},
  author = {Ankit Rai},
  journal= {arXiv preprint arXiv:2312.09945},
  year   = {2023}
}

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12 pages