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We compute the algebraic K-theory of the Hecke algebra of a reductive p-adic group G using the fact that the Farrell-Jones Conjecture is known in this context. The main tool will be the properties of the associated Bruhat-Tits building and…

K理论与同调 · 数学 2025-05-21 Arthur Bartels , Wolfgang Lueck

Regular algebraic $K$-theory for groups is a homology theory for discrete groups closely connected (but different from) group homology. It also gives a version of algebraic $K$-theory for rings by the simple functorial mapping assigning to…

K理论与同调 · 数学 2024-10-02 Ulrich Haag

Motivated by the Farrell-Jones Conjecture for group rings, we formulate the $\mathcal{C}$op-Farrell-Jones Conjecture for the K-theory of Hecke algebras of td-groups. We prove this conjecture for (closed subgroups of) reductive p-adic groups…

K理论与同调 · 数学 2023-12-22 Arthur Bartels , Wolfgang Lueck

We consider the algebraic K-theory of a truncated polynomial algebra in several commuting variables, K(k[x_1, ..., x_n]/(x_1^a_1, ..., x_n^a_n)). This naturally leads to a new generalization of the big Witt vectors. If k is a perfect field…

代数拓扑 · 数学 2013-10-08 Vigleik Angeltveit , Teena Gerhardt , Michael A. Hill , Ayelet Lindenstrauss

We show that for a coconnective ring spectrum satisfying regularity and flatness assumptions, its algebraic K-theory agrees with that of its $\pi_0$. We prove this as a consequence of a more general devissage result for stable infinity…

K理论与同调 · 数学 2021-12-30 Robert Burklund , Ishan Levy

We give an explicit algebraic description, based on prismatic cohomology, of the algebraic K-groups of rings of the form $O_K/I$ where $K$ is a p-adic field and $I$ is a non-trivial ideal in the ring of integers $O_K$; this class includes…

K理论与同调 · 数学 2024-05-08 Benjamin Antieau , Achim Krause , Thomas Nikolaus

Let a compact group G act on real or complex C*-algebras A and B, with A separable and B sigma-unital. We express the G-equivariant Kasparov groups KK_n(A,B) by algebraic K-groups of a certain additive category.

K理论与同调 · 数学 2007-05-23 Tamaz Kandelaki

We establish some results on the structure of the geometric unipotent radicals of pseudo-reductive k-groups. In particular, our main theorem gives bounds on the nilpotency class of geometric unipotent radicals of standard pseudo-reductive…

群论 · 数学 2018-09-10 Michael Bate , Benjamin Martin , Gerhard Roehrle , David Stewart

The article gives the second part of the treatise on Regular Algebraic $K$-theory (Sections V & VI) of the author. Regular algebraic $K$-theory for groups is a homology theory for discrete groups closely connected to (but different from)…

K理论与同调 · 数学 2024-10-11 Ulrich Haag

We compute K-theory for the reduced group C*-algebras of generalized Lamplighter groups.

K理论与同调 · 数学 2020-07-07 Xin Li

A full subcategory of modules over a commutative ring $R$ is wide if it is abelian and closed under extensions. Hovey \cite{wide} gave a classification of wide subcategories of finitely presented modules over regular coherent rings in terms…

K理论与同调 · 数学 2009-12-03 Sunil K. Chebolu

We show that the hermitian K-theory space of a commutative ring R can be identified, up to A^1-homotopy, with the group completion of the groupoid of oriented finite Gorenstein R-algebras, i.e., finite locally free R-algebras with…

代数几何 · 数学 2022-09-14 Marc Hoyois , Joachim Jelisiejew , Denis Nardin , Maria Yakerson

We establish formulas for computation of the higher algebraic $K$-groups of the endomorphism rings of objects linked by a morphism in an additive category. Let ${\mathcal C}$ be an additive category, and let $Y\ra X$ be a covariant morphism…

K理论与同调 · 数学 2018-05-01 Hongxing Chen , Changchang Xi

We compute certain strict Picard spectra of $K(1)$-local $K$-theory spectra of schemes in terms of Brauer groups, using the map that takes an Azumaya algebra to its $K(1)$-local $K$-theory and proving a K\"unneth formula in that setting.…

K理论与同调 · 数学 2026-02-10 Maxime Ramzi

In "All p-adic reductive groups are tame" Bernstein proved that for a reductive group G over a local non-archimedean field F and a compact open subgroup K of G there exists a uniform bound N(G,K) such that for every irreducible, smooth, and…

表示论 · 数学 2015-11-19 Alexander Kemarsky

We obtain the Plancherel theorem for the quotient of a simple Lie group of real rank one by a convex-cocompact discrete subgroup and its consequences for the spectrum of locally invariant differential operators on bundles over Kleinian…

微分几何 · 数学 2007-05-23 U. Bunke , M. Olbrich

For a reductive group scheme over a regular semi-local ring, we prove an equivarinat version of the Gersten conjecture. We draw some interesting consequences for the representation rings of such reductive group schemes. We also prove the…

代数几何 · 数学 2009-06-23 Amalendu Krishna

In this paper, we develop several techniques for computing the higher G-theory and K-theory of quotient stacks. Our main results for computing these groups are in terms of spectral sequences. We show that these spectral sequences degenerate…

代数几何 · 数学 2012-10-04 Roy Joshua , Amalendu Krishna

We show that the K-theory spectra of many assemblers, such as the assembler of polytopes in euclidean, hyperbolic or spherical geometry, as well as the assembler of definable sets, are equivalent to the K-theory spectrum of a squares…

K理论与同调 · 数学 2025-12-02 Josefien Kuijper

We construct $C^\ast$-categories that are anologues of the categories used in controlled algebraic $K$-theory. We then show that the reduced $C^\ast$-algebra of a finitely presented group and an associated controlled $C^\ast$-category have…

K理论与同调 · 数学 2010-12-08 Paul D. Mitchener
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