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This work is dedicated to the construction of a new motivic homotopy theory for (log) schemes, generalizing Morel-Voevodsky's (un)stable $\mathbb{A}^1$-homotopy category. Our framework can be used to represent log topological Hochschild and…

Algebraic Geometry · Mathematics 2025-07-03 Federico Binda , Doosung Park , Paul Arne Østvær

We study commutative complex $K$-theory, a generalised cohomology theory built from spaces of ordered commuting tuples in the unitary groups. We show that the spectrum for commutative complex $K$-theory is stably equivalent to the…

Algebraic Topology · Mathematics 2018-03-16 Simon Gritschacher

In this article we further the study of non-commutative motives. Our main result is the construction of a symmetric monoidal structure on the localizing motivator Mot of dg categories. As an application, we obtain : (1) a computation of the…

K-Theory and Homology · Mathematics 2010-02-03 Denis-Charles Cisinski , Goncalo Tabuada

Let g be a symmetrisable Kac-Moody algebra, and U_h(g) the corresponding quantum group. We showed in arXiv:1610.09744 and arXiv:1610.09741 that the braided quasi-Coxeter structure on integrable, category O representations of U_h(g) which…

Quantum Algebra · Mathematics 2019-02-26 Andrea Appel , Valerio Toledano-Laredo

We study the representation theory of the Lie superalgebra $\mathfrak{gl}(1|1)$, constructing two spectral sequences which eventually annihilate precisely the superdimension zero indecomposable modules in the finite-dimensional category.…

Representation Theory · Mathematics 2023-07-13 Inna Entova-Aizenbud , Vera Serganova , Alexander Sherman

We give a simple universal property of the multiplicative structure on the Thom spectrum of an $n$-fold loop map, obtained as a special case of a characterization of the algebra structure on the colimit of a lax $\mathcal{O}$-monoidal…

Algebraic Topology · Mathematics 2026-01-05 Omar Antolín-Camarena , Tobias Barthel

We present a Galois-theoretical criterion for the simplicity of the Lyapunov spectrum of the Kontsevich-Zorich cocycle over the Teichmueller flow on the $SL_2(R)$-orbit of a square-tiled surface. The simplicity of the Lyapunov spectrum has…

Dynamical Systems · Mathematics 2016-06-08 Carlos Matheus , Martin Moeller , Jean-Christophe Yoccoz

We construct a combinatorially defined involution on the algebraic $K$-theory of the ring spectrum associated to a bimonoidal category with anti-involution. Particular examples of such are braided bimonoidal categories. We investigate…

Algebraic Topology · Mathematics 2014-10-01 Birgit Richter

The purpose of this paper is twofold. First, we use the motivic Landweber exact functor theorem to deduce that the Bott inverted infinite projective space is homotopy algebraic $K$-theory. The argument is considerably shorther than any…

Algebraic Geometry · Mathematics 2008-10-17 Niko Naumann , Markus Spitzweck , Paul Arne Østvær

Fix an odd prime $p$. Let $X$ be a pointed space whose $p$-completed K-theory $\mathrm{KU}_p^*(X)$ is an exterior algebra on a finite number of odd generators; examples include odd spheres and many H-spaces. We give a…

Algebraic Topology · Mathematics 2026-01-21 Sven van Nigtevecht

We view strict ring spectra as generalized rings. The study of their algebraic K-theory is motivated by its applications to the automorphism groups of compact manifolds. Partial calculations of algebraic K-theory for the sphere spectrum are…

Algebraic Topology · Mathematics 2022-06-22 John Rognes

We give a simple algebraic model for rational G-spectra over an exceptional subgroup, for any compact Lie group G. Moreover, all our Quillen equivalences are symmetric monoidal, so as a corollary we obtain a monoidal algebraic model for…

Algebraic Topology · Mathematics 2015-11-20 Magdalena Kedziorek

The dual motivic Steenrod algebra with mod $\ell$ coefficients was computed by Voevodsky over a base field of characteristic zero, and by Hoyois, Kelly, and {\O}stv{\ae}r over a base field of characteristic $p \neq \ell$. In the case $p =…

Algebraic Geometry · Mathematics 2026-02-20 Martin Frankland , Markus Spitzweck

We show that the slice filtration introduced by Voevodsky is compatible in a suitable sense with the symmetric monoidal structure in the category of motivic symmetric T-spectra constructed by Jardine. It follows from this compatibility that…

Algebraic Geometry · Mathematics 2008-12-08 Pablo Pelaez

Let g be a complex, simple Lie algebra and t a Cartan subalgebra of g. A new unitary, flat connection on t with values in any finite-dimensional g-module V and simple poles along the root hyperplanes was recently introduced by J. Millson…

Quantum Algebra · Mathematics 2009-09-25 Valerio Toledano-Laredo

Let $A$ be an algebra over a commutative ring $k$. It is known that the categories of non-commutative descent data, of comodules over the Sweedler canonical coring, of right $A$-modules with a flat connection are isomorphic as braided…

Quantum Algebra · Mathematics 2012-10-31 A. L. Agore , S. Caenepeel , G. Militaru

We construct and study a theory of bivariant cobordism of derived schemes. Our theory provides a vast generalization of the algebraic bordism theory of characteristic 0 algebraic schemes, constructed earlier by Levine and Morel, and a…

Algebraic Geometry · Mathematics 2022-03-24 Toni Annala

The machinery of framed (pre)sheaves was developed by Voevodsky [V1]. Based on the theory, framed motives of algebraic varieties are introduced and studied in [GP1]. An analog of Voevodsky's Cancellation Theorem [V1] is proved in this paper…

K-Theory and Homology · Mathematics 2021-03-05 Alexey Ananyevskiy , Grigory Garkusha , Ivan Panin

Let $R$ be a commutative unital ring. Given a finitely presented affine $R$-group scheme $G$ acting on a separated scheme $X$ of finite type over $R$, we show that there is a prime $p_0$ such that for any $R$-algebra $k$ which is an…

Group Theory · Mathematics 2026-05-27 Benjamin Martin , David I. Stewart , Lewis Topley

We study the cohomology theory and the canonical Milnor-Witt cycle module associated to a motivic spectrum. We prove that the heart of Morel-Voevodsky stable homotopy category over a perfect field (equipped with its homotopy t-structure) is…

Algebraic Geometry · Mathematics 2021-02-18 Niels Feld