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Let G be a semisimple affine algebraic group over a field F. Assuming that G becomes of inner type over some finite field extension of F of degree a power of a prime p, we investigate the structure of the Chow motives with coefficients in a…

Algebraic Geometry · Mathematics 2009-11-17 Nikita A. Karpenko

We study the Chow motive (with rational coefficients) of a hypersurface X in the projective space by using the variety F(X) of l-dimensional planes contained in X. If the degree of X is sufficiently small we show that the primitive part of…

Algebraic Geometry · Mathematics 2008-01-17 Andre Chatzistamatiou

We show in many cases the existence of adjoints to extension of scalars on categories of motivic nature, in the framework of field extensions. This is to be contrasted with the more classical situation where one deals with a finite type…

Algebraic Geometry · Mathematics 2020-06-04 Bruno Kahn

A motive over a field $k$ is of abelian type if it belongs to the thick and rigid subcategory of Chow motives spanned by the motives of abelian varieties over $k$. This paper contains three sections of independent interest. First, we show…

Algebraic Geometry · Mathematics 2015-07-28 Charles Vial

In this article we initiate the study of the tensor triangular geometry of the categories Mot(k)_a and Mot(k)_l of non-commutative motives (over a base ring k). Since the full computation of the spectrum of Mot(k)_a and Mot(k)_l seems…

K-Theory and Homology · Mathematics 2012-07-17 Ivo Dell'Ambrogio , Goncalo Tabuada

With representation-theoretic applications in mind, we construct a formalism of reduced motives with integral coefficients. These are motivic sheaves from which the higher motivic cohomology of the base scheme has been removed. We show that…

Algebraic Geometry · Mathematics 2022-03-16 Jens Niklas Eberhardt , Jakob Scholbach

We investigate several interrelated foundational questions pertaining to the study of motivic dga's of Dan-Cohen--Schlank [8] and Iwanari [13]. In particular, we note that morphisms of motivic dga's can reasonably be thought of as a…

Algebraic Geometry · Mathematics 2019-11-27 Ishai Dan-Cohen , Tomer Schlank

We consider proper, algebraic semismall maps f from a complex algebraic manifold X. We show that the topological Decomposition Theorem implies a "motivic" decomposition theorem for the rational algebraic cycles of X and, in the case X is…

Algebraic Geometry · Mathematics 2007-05-23 Mark Andrea A. de Cataldo , Luca Migliorini

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 introduce spaces of exponential constructible functions in the motivic setting for which we construct direct image functors in the absolute and relative cases. This allows us to define a motivic Fourier transformation for which we get…

Algebraic Geometry · Mathematics 2011-01-28 R. Cluckers , F. Loeser

We prove: if the (\'etale or de Rham) realization functor is conservative on the category $DM_{gm}$ of Voevodsky motives with rational coefficients then motivic zeta functions of arbitrary varieties are rational and numerical motives are…

Algebraic Geometry · Mathematics 2018-11-29 Mikhail V. Bondarko

For any smooth projective moduli space $M$ of Gieseker stable sheaves on a complex projective K3 surface (or an abelian surface) S, we prove that the Chow motive $\mathfrak{h}(M)$ becomes a direct summand of a motive $\bigoplus…

Algebraic Geometry · Mathematics 2018-06-22 Tim-Henrik Bülles

In this article we continue the development of a theory of noncommutative motives. We construct categories of A1-homotopy noncommutative motives, described their universal properties, and compute their spectra of morphisms in terms of…

Algebraic Geometry · Mathematics 2014-02-19 Goncalo Tabuada

In this paper certain Chow weight structures on the "big" triangulated motivic categories $DM_R^{eff}\subset DM_R$ are defined in terms of motives of all smooth varieties over the base field. This definition allows studying basic properties…

Algebraic Geometry · Mathematics 2018-03-28 Mikhail V. Bondarko , David Z. Kumallagov

In this paper, we present a general approach to establish motivic cohomology and build part of its six operations formalism. Applying this together with symplectic orientation on MW-motivic cohomology, we discuss the embedding theorem of…

Algebraic Geometry · Mathematics 2018-10-31 Nanjun Yang

We prove that under semismall smooth flops, smooth projective varieties have (non-canonically) isomorphic Chow motives with coefficients in any noetherian local ring $\Lambda$ by comparing the pushforward of the constant intersection…

Algebraic Geometry · Mathematics 2016-03-22 Wille Liu

We construct an algebraic-cycle based model for the motivic cohomology on the category of schemes of finite type over a field, where schemes may admit arbitrary singularities and may be non-reduced. We show that our theory is functorial on…

Algebraic Geometry · Mathematics 2021-12-30 Jinhyun Park

Let f be a regular function on a nonsingular complex algebraic variety of dimension d. We prove a formula for the motivic zeta function of f in terms of an embedded resolution. This formula is over the Grothendieck ring itself, and…

Algebraic Geometry · Mathematics 2012-09-18 Dirk Segers , Lise Van Proeyen , Willem Veys

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 paper 0704.4003, Bondarko recently defined the notion of weight structure, and proved that the category $\DgM$ of geometrical motives over a perfect field k, as defined and studied by Voevodsky, Suslin and Friedlander, is canonically…

Algebraic Geometry · Mathematics 2010-01-14 J. Wildeshaus