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Let X be an n-dimensional smooth proper variety over a field admitting resolution of singularities, and Y,Z two disjoint closed subsets of X. We establish an isomorphism M(X-Z,Y) isomorphic to M(X-Y,Z)^*(n)[2n] in Voevodsky's triangulated…

Algebraic Geometry · Mathematics 2010-09-13 Luca Barbieri-Viale , Bruno Kahn

For an $\E$-ring spectrum $R$ and a map $f:X\to Pic(R)$ of spaces, the Thom spectrum $\T f$ is a comodule over $R\otimes\Si X$. In this parper we study the topological coHochschild homology of $R\otimes\Si X$ with coefficient $\T f$. More…

Algebraic Topology · Mathematics 2026-01-19 Jiaxi Zha

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

Already in the 1960s Grothendieck understood that one could obtain an almost entirely satisfactory theory of motives over a finite field when one assumes the full Tate conjecture. In this note we prove a similar result for motivic…

Algebraic Geometry · Mathematics 2021-01-19 James S. Milne , Niranjan Ramachandran

We define a motivic Greenlees spectral sequence by characterising an associated $t$-structure. We then examine a motivic version of topological Hochschild homology for the motivic cohomology spectrum modulo a prime number $p$. Finally, we…

Algebraic Topology · Mathematics 2024-08-02 Federico Ernesto Mocchetti

Let k be an algebraically closed field of characteristic zero. Let SH(k) denote the motivic stable homotopy category of T-spectra over k and SH the classical stable homotopy category. Let c:SH -> SH(k) be the functor induced by sending a…

Algebraic Geometry · Mathematics 2014-02-26 Marc Levine

We construct an algebraic commutative ring T- spectrum BO which is stably fibrant and (8,4)- periodic and such that on SmOp/S the cohomology theory (X,U) -> BO^{p,q}(X_{+}/U_{+}) and Schlichting's hermitian K-theory functor (X,U) ->…

Algebraic Geometry · Mathematics 2018-03-13 Ivan Panin , Charles Walter

Given a global equivariant ultracommutative ring spectrum $E$ and inclusion $H\hookrightarrow G$ of finite groups, one may apply geometric fixed points to the norm $N_H^G E_H \to E_G$ to obtain what we call a \emph{geometric norm} $\Phi^H E…

Algebraic Topology · Mathematics 2026-05-11 William Balderrama , Jack Morgan Davies , Sil Linskens

The goal of this paper is to define a certain Chow weight structure for the category of Voevodsky's motivic complexes with integral coefficients (as described by Cisinski and Deglise) over any excellent finite-dimensional separated scheme…

Algebraic Geometry · Mathematics 2013-12-31 Mikhail V. Bondarko

We show how formal and rigid geometry can be used in the theory of complex singularities, and in particular in the study of the Milnor fibration and the motivic zeta function. We introduce the so-called analytic Milnor fiber associated to…

Algebraic Geometry · Mathematics 2008-09-26 Johannes Nicaise , Julien Sebag

We establish a formal framework for Rognes's homotopical Galois theory and adapt it to the context of motivic spaces and spectra. We discuss examples of Galois extensions between Eilenberg-MacLane motivic spectra and between the Hermitian…

Algebraic Topology · Mathematics 2016-11-03 Agnes Beaudry , Kathryn Hess , Magdalena Kedziorek , Mona Merling , Vesna Stojanoska

We study semistable symmetric spectra based on quite general monoidal model categories, including motivic examples. In particular, we establish a generalization of Schwede's list of equivalent characterizations of semistability in the case…

Algebraic Topology · Mathematics 2014-04-17 Stephan Haehne , Jens Hornbostel

For any complete hyperbolic three-manifold of finite volume, we construct a mixed Tate motive defined over the invariant trace field whose image under Beilinson regulator equals the PSL2(C)-Chern-Simons invariant, thus equals the complex…

Algebraic Geometry · Mathematics 2025-02-18 Dong Uk Lee

A natural place to study the Chow ring of the classifying space $BG$, for $G$ a linear algebraic group, is Voevodsky's triangulated category of motives, inside which Morel and Voevodsky, and Totaro have defined motives $M(BG)$ and…

Algebraic Geometry · Mathematics 2022-12-19 Tudor Pădurariu

In this final part of a 3-part paper we introduce the pair of "wings" of the abstract PL-colored complexes $\mathcal{H}_{m}^\star$, described in the second paper. The wings, via a weight enhanced Tutte's barycentric embedding of a planar…

Geometric Topology · Mathematics 2013-02-26 Sóstenes Lins , Ricardo Machado

The cotangent complex of a map of commutative rings is a central object in deformation theory. Since the 1990s, it has been generalized to the homotopical setting of $E_\infty$-ring spectra in various ways. In this work we first establish,…

Algebraic Topology · Mathematics 2020-10-22 Nima Rasekh , Bruno Stonek

This is the first in a series of papers, where we introduce and study topological spaces that realize the algebras of quasi-invariants of finite reflection groups. Our result can be viewed as a generalization of a well-known theorem of A.…

Algebraic Topology · Mathematics 2026-02-17 Yuri Berest , Ajay C. Ramadoss

We construct well-behaved extensions of the motivic spectra representing generalized motivic cohomology and connective Balmer--Witt K-theory (among others) to mixed characteristic Dedekind schemes on which 2 is invertible. As a consequence…

K-Theory and Homology · Mathematics 2022-02-02 Tom Bachmann

Building on Quillen's rational homotopy theory, we obtain algebraic models for the rational homotopy theory of parametrised spectra. For any simply-connected space $X$ there is a dg Lie algebra $\Lambda_X$ and a (coassociative…

Algebraic Topology · Mathematics 2021-05-05 Vincent Braunack-Mayer

Let $k$ be a field of characteristic zero containing all roots of unity and $K=k((t))$. We build a ring morphism from the Grothendieck group of semi-algebraic sets over $K$ to the Grothendieck group of motives of rigid analytic varieties…

Algebraic Geometry · Mathematics 2017-07-21 Arthur Forey