Motivic and $\ell$-adic realizations of the category of singularities of the zero locus of a global section of a vector bundle

Abstract

We study the motivic and $\ell$-adic realizations of the dg category of singularities of the zero locus of a global section of a line bundle over a regular scheme. We will then use the formula obtained in this way together with a theorem due to D.~Orlov and J.~Burke - M.~Walker to give a formula for the $\ell$-adic realization of the dg category of singularities of the special fiber of a scheme over a regular local ring of dimension $n$.

arXiv commentSecond version. In particular, section 6.1 has been revised and the proof of Proposition 3.3.3 clarified. Accepted for publication in Selecta Mathematica, New Series