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We prove a general stability theorem for $p$-class groups of number fields along relative cyclic extensions of degree $p^2$, which is a generalization of a finite-extension version of Fukuda's theorem by Li, Ouyang, Xu and Zhang. As an…

数论 · 数学 2021-05-10 Yasushi Mizusawa , Kota Yamamoto

We study the category of $\mathbf{P}$-equivariant modules over the infinite variable polynomial ring, where $\mathbf{P}$ denotes the subgroup of the infinite general linear group $\mathbf{GL}(\mathbf{C}^\infty)$ consisting of elements…

交换代数 · 数学 2024-07-04 Teresa Yu

We classify thick subcategories of the $\infty$-categories of perfect modules over ring spectra which arise as functions on even periodic derived stacks satisfying affineness and regularity conditions. For example, we show that the thick…

代数拓扑 · 数学 2015-08-12 Akhil Mathew

We give refined bounds for the regularity of FI-modules and the stable ranges of FI-modules for various forms of their stabilization studied in the representation stability literature. We show that our bounds are sharp in several cases. We…

表示论 · 数学 2023-12-19 Cihan Bahran

We prove that the homotopy theory of Picard 2-categories is equivalent to that of stable 2-types.

代数拓扑 · 数学 2019-05-01 Nick Gurski , Niles Johnson , Angélica M. Osorno

We construct the moduli stack of properly balanced vector bundles on semistable curves and we determine explicitly its Picard group. As a consequence, we obtain an explicit description of the Picard groups of the universal moduli stack of…

代数几何 · 数学 2018-06-11 Roberto Fringuelli

Let $\mathcal{C}$ be a smooth, projective, geometrically integral curve defined over a perfect field $\mathbb{F}$. Let $k=\mathbb{F}(\mathcal{C})$ be the function field of $\mathcal{C}$. Let $\mathbf{G}$ be a split simply connected…

群论 · 数学 2024-08-09 Claudio Bravo , Benoit Loisel

We compute the Picard groups with integral coefficients of the Hurwitz stacks parametrizing degree $4$ and $5$ covers of $\mathbb{P}^1$. As a consequence, we also determine the integral Picard groups of the Hurwitz stacks parametrizing…

代数几何 · 数学 2021-10-29 Samir Canning , Hannah Larson

We construct a moduli space of stable pairs over a smooth projective variety, parametrizing morphisms from a fixed coherent sheaf to a varying sheaf of fixed topological type, subject to a stability condition. This generalizes the notion…

代数几何 · 数学 2018-03-16 Yinbang Lin

We answer a question posed by Carlson, Peng, and Wheeler, and demonstrate that in general Rickard modules in relatively stable categories are not idempotent modules even if one localizes with respect to a tensor ideal subcategory. We also…

表示论 · 数学 2007-11-06 Matthew Grime

We survey some methods developed in a series of papers, for classifying localising subcategories of tensor triangulated categories. We illustrate these methods by proving a new theorem, providing such a classification in the case of the…

表示论 · 数学 2020-10-21 Dave Benson , Srikanth B. Iyengar , Henning Krause , Julia Pevtsova

Inspired by the work of Bell on the dynamical Mordell-Lang conjecture, and by family Floer cohomology, we construct p-adic analytic families of bimodules on the Fukaya category of a monotone or negatively monotone symplectic manifold,…

辛几何 · 数学 2024-12-18 Yusuf Barış Kartal

The stable category of modules over the algebra of a finite group with coefficients in a field is a compactly generated tensor triangulated category, that has been studied extensively in representation theory. In this paper, we provide a…

表示论 · 数学 2025-10-28 Ioannis Emmanouil , Olympia Talelli

For a finite group $G$, there is a map $RO(G) \to {\rm Pic}(Sp^G)$ from the real representation ring of $G$ to the Picard group of $G$-spectra. This map is not known to be surjective in general, but we prove that when $G$ is cyclic this map…

代数拓扑 · 数学 2021-09-13 Vigleik Angeltveit

We study actions of finite groups on moduli spaces of stable holomorphic vector bundles and relate the fixed-point sets of those actions to representation varieties of certain orbifold fundamental groups.

代数几何 · 数学 2019-11-05 Florent Schaffhauser

An equivariant stable birational invariant of an action of a finite group on a smooth projective variety is the first cohomology group of the Picard module. Bogomolov-Prokhorov and Shinder computed this for actions of cyclic groups on…

代数几何 · 数学 2022-03-04 Andrew Kresch , Yuri Tschinkel

Given a connected 2-complex X with fundamental group G, we show how pi_3(X) may be computed as a module over Z[G]. Further we show that if X is a finite connected 2-complex with G (the fundamental group) finite of odd order, then the stable…

代数拓扑 · 数学 2023-08-25 Wajid Mannan

We prove a new localization theorem for stable model categories if the localizing subcategory is generated by a precovering class in the model category. We use this to show how one may explicitly realize certain Bousfield localization…

范畴论 · 数学 2007-10-30 Matthew Grime

This paper is a continuation of the version I of the same title, which intends to clarify and expand the results in the last chapter of `the green book' by the second author. In particular, we give the stable homotopy groups of $p$-local…

代数拓扑 · 数学 2018-06-29 Hirofumi Nakai , Douglas C. Ravenel

We study deformations of invertible bimodules and the behavior of Picard groups under deformation quantization. While K_0-groups are known to be stable under formal deformations of algebras, Picard groups may change drastically. We identify…

量子代数 · 数学 2007-05-23 Henrique Bursztyn , Stefan Waldmann