English
Related papers

Related papers: Isotropic motives

200 papers

Let D be a central simple algebra of prime degree over a field and let E be an SL_1(D)-torsor. We determine the complete motivic decomposition of certain compactifications of E. We also compute the Chow ring of E.

Algebraic Geometry · Mathematics 2014-02-25 Nikita A. Karpenko , Alexander S. Merkurjev

We develop a motivic cohomology theory, representable in the Voevodsky's triangulated category of motives, for smooth separated Deligne-Mumford stacks and show that the resulting higher Chow groups are canonically isomorphic to the higher…

Algebraic Geometry · Mathematics 2025-05-30 Utsav Choudhury , Neeraj Deshmukh , Amit Hogadi

We prove formulas for the rational Chow motives of moduli spaces of semistable vector bundles and Higgs bundles of rank 3 and coprime degree on a smooth projective curve. Our approach involves identifying criteria to lift identities in (a…

Algebraic Geometry · Mathematics 2021-12-21 Lie Fu , Victoria Hoskins , Simon Pepin Lehalleur

We investigate cohomological invariants and motivic invariants of semisimple algebraic groups arising in the Freudenthal magic square. Besides, we show that if the Rost invariant of a strongly inner group of type $E_7$ is a sum of at most…

Algebraic Geometry · Mathematics 2026-05-05 Nikita Geldhauser , Alexander Henke , Maksim Zhykhovich

Let K be a field of characteristic 0 and A be a rigid tensor K-linear category. Let M be a finite-dimensional object of A in the sense of Kimura-O'Sullivan. We prove that the "motivic" zeta function of M with coefficients in K\_0(A) has a…

Algebraic Geometry · Mathematics 2010-09-13 Bruno Kahn

In this paper, the Lawson homology and morphic cohomology are defined on the Chow motives. We also define the rational coefficient Lawson homology and morphic cohomology of the Chow motives of finite quotient projective varieties. As a…

Algebraic Geometry · Mathematics 2019-11-01 Wenchuan Hu , Li Li

We show that the chow group of $p$-cycles with rational coefficients are isomorphic to the corresponding rational homology groups for smooth complex projective varieties carrying a holomorphic vector field with an isolated zero locus. As…

Algebraic Geometry · Mathematics 2019-11-13 Wenchuan Hu

We construct the $\mathbb{A}^1$-local stable motivic homotopy categories of fs log schemes. For schemes with the trivial log structure, our construction is equivalent to the original construction of Morel-Voevodsky. We prove the…

Algebraic Geometry · Mathematics 2023-03-08 Doosung Park

Let $k$ be a perfect field of characteristic $p>0$. In this paper, without assuming resolution of singularities, we prove that the triangulated category of motives with modulus with rational coefficients is equivalent to Voevodsky's…

Algebraic Geometry · Mathematics 2026-04-07 Keiho Matsumoto

Fix a base field F, a finite field K and consider a sequence of central simple F-algebras A_1,...,A_n. In this note we provide some results toward a classification of the indecomposable motives lying in the motivic decompositions of…

Algebraic Geometry · Mathematics 2011-12-22 Charles De Clercq

We describe Somekawa's K-group associated to a finite collection of semi-abelian varieties (or more general sheaves) in terms of the tensor product in Voevodsky's category of motives. While Somekawa's definition is based on Weil…

Algebraic Geometry · Mathematics 2019-12-19 Bruno Kahn , Takao Yamazaki

We give the first examples of finite groups G such that the Chow ring of the classifying space BG depends on the base field, even for fields containing the algebraic closure of Q. As a tool, we give several characterizations of the…

Algebraic Geometry · Mathematics 2016-09-21 Burt Totaro

In this thesis we compute motivic classes of hypertoric varieties, Nakajima quiver varieties and open de Rham spaces in a certain localization of the Grothendieck ring of varieties. Furthermore we study the $p$-adic pushforward of the Haar…

Algebraic Geometry · Mathematics 2017-09-21 Dimitri Wyss

We construct and study a triangulated category of motives with modulus $\mathbf{MDM}_{\mathrm{gm}}^{\mathrm{eff}}$ over a field $k$ that extends Voevodsky's category $\mathbf{DM}_{\mathrm{gm}}^{\mathrm{eff}}$ in such a way as to encompass…

Algebraic Geometry · Mathematics 2019-03-05 Bruno Kahn , Shuji Saito , Takao Yamazaki

We construct a comparison functor between ($\mathbf{A}^1$-local) tame motives and ($\overline{\square}$-local) log-\'etale motives over a field $k$ of positive characteristic. This generalizes Binda--Park--{\O}stv{\ae}r's comparison for the…

Algebraic Geometry · Mathematics 2025-06-27 Alberto Merici

In this article we formalize and enhance Kontsevich's beautiful insight that Chow motives can be embedded into non-commutative ones after factoring out by the action of the Tate object. We illustrate the potential of this result by…

K-Theory and Homology · Mathematics 2011-03-02 Goncalo Tabuada

In this paper we give a proof of the Bloch-Kato conjecture relating motivic cohomology and etale cohomology. It is a corrected version of the paper with the same title which posted earlier.

Algebraic Geometry · Mathematics 2010-02-09 Vladimir Voevodsky

In this thesis we compare V. Voevodsky's geometric motives to the derived category of M. Nori's abelian category of mixed motives by constructing a triangulated tensor functor between them. It will be compatible with the Betti realizations…

Algebraic Geometry · Mathematics 2016-09-20 Daniel Harrer

Given a finite group G, we develop a theory of G-equivariant noncommutative motives. This theory provides a well-adapted framework for the study of G-schemes, Picard groups of schemes, G-algebras, 2-cocycles, equivariant algebraic K-theory,…

Algebraic Geometry · Mathematics 2016-08-24 Goncalo Tabuada

We revisit the classical two-dimensional McKay correspondence in two respects: The first one, which is the main point of this work, is that we take into account of the multiplicative structure given by the orbifold product; second, instead…

Algebraic Geometry · Mathematics 2018-04-10 Lie Fu , Zhiyu Tian