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GYSIN TRIANGLES IN THE CATEGORY OF MOTIFS WITH MODULUS

Published online by Cambridge University Press:  06 January 2022

Abstract

In this article, we study a Gysin triangle in the category of motives with modulus (Theorem 1.2). We can understand this Gysin triangle as a motivic lift of the Gysin triangle of log-crystalline cohomology due to Nakkajima and Shiho. After that we compare motives with modulus and Voevodsky motives (Corollary 1.6). The corollary implies that an object in $\operatorname {\mathbf {MDM}^{\operatorname {eff}}}$ decomposes into a p-torsion part and a Voevodsky motive part. We can understand the corollary as a motivic analogue of the relationship between rigid cohomology and log-crystalline cohomology.

Type
Research Article
Copyright
© The Author(s), 2022. Published by Cambridge University Press

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