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A twisted torus link $T(p,q,r,s)$ is obtained by performing $s$ full twists on $r$ adjacent strands of the $(p,q)$-torus link. In this paper, we classify twisted torus links that are unlinks. We give a complete characterization of all…

Geometric Topology · Mathematics 2026-02-05 Hong Chang , Thiago de Paiva , Qing Lan

Generalizing results from \cite{DTk,DU} we study the fine structure of locally minimal (locally) precompact Abelian groups (these are the locally essential subgroups $G$ of LCA groups $L$, i.e., such that $G$ non-trivially meets all…

Group Theory · Mathematics 2025-10-21 Dikran Dikranjan , Wei He , Dekui Peng

We introduce and analyse a general notion of fundamental group for noncommutative spaces, described by differential graded algebras. For this we consider connections on finitely generated projective bimodules over differential graded…

Quantum Algebra · Mathematics 2019-10-23 Walter D. van Suijlekom , Jeroen Winkel

We establish the local Langlands conjecture for small rank general spin groups $GSpin_4$ and $GSpin_6$ as well as their inner forms. We construct appropriate $L$-packets and prove that these $L$-packets satisfy the properties expected of…

Number Theory · Mathematics 2024-10-07 Mahdi Asgari , Kwangho Choiy

We give a classification of the equivariant principal $G$-bundles on a nonsingular toric variety when $G$ is a closed Abelian subgroup of $GL_k(\mathbb{C})$. We prove that any such bundle splits, that is, admits a reduction of structure…

Algebraic Geometry · Mathematics 2013-11-22 Arijit Dey , Mainak Poddar

Using Conley theory we show that local attractors remain (past) attractors under small non-autonomous perturbations. In particular, the attractors of the perturbed systems will have positive invariant neighborhoods and converge upper…

Dynamical Systems · Mathematics 2011-03-18 Martin Kell

There are two versions of endoscopic transfer factors to accommodate the different versions, classical or renormalized, of the local Langlands correspondence. An examination of the structure of these complex-valued factors shows that the…

Representation Theory · Mathematics 2015-03-24 D. Shelstad

It has been claimed by Halmos in [Comment on the real line, Bull. Amer. Math. Soc., 50 (1944), 877-878] that if G is a Hausdorff locally compact topological abelian group and if the character group of G is torsion free then G is divisible.…

General Topology · Mathematics 2011-03-15 Daniel Victor Tausk

We strengthen the gluing theorem occurring on the spectral side of the geometric Langlands conjecture. While the latter embeds $IndCoh_N(LS_G)$ into a category glued out of 'Fourier coefficients' parametrized by standard parabolics, our…

Algebraic Geometry · Mathematics 2024-04-17 Dario Beraldo

Given a homomorphism from a knot group to a fixed group, we introduce an element of a $K_1$-group, which is a generalization of (twisted) Alexander polynomials. We compare this $K_1$-class with other Alexander polynomials. In terms of…

Geometric Topology · Mathematics 2020-11-24 Takefumi Nosaka

Relative Langlands duality structures the study of automorphic periods around a putative duality between certain group actions of Langlands dual reductive groups. In this article, after giving a self-contained exposition of the relevant…

Number Theory · Mathematics 2024-05-29 Eric Y. Chen , Akshay Venkatesh

We discuss some categorical aspects of the objects that appear in the construction of the Monster and other sporadic simple groups. We define the basic representation of the categorical torus $\mathcal T$ classified by an even symmetric…

Group Theory · Mathematics 2024-05-28 Nora Ganter

We extend the notion of the $J$-invariant to arbitrary semisimple linear algebraic groups and provide complete decompositions for the normed Chow motives of all generically quasi-split twisted flag varieties. Besides, we establish some…

Algebraic Geometry · Mathematics 2025-10-29 Nikita Geldhauser , Maksim Zhykhovich

By computing reducibility points of parabolically induced representations, we construct, to within at most two unramified quadratic characters, the Langlands parameter of an arbitrary depth zero irreducible cuspidal representation $\pi$ of…

Representation Theory · Mathematics 2020-07-08 Jaime Lust , Shaun Stevens

In this paper, first we introduce the notion of nonabelian embedding tensors between Lie triple systems and show that nonabelian embedding tensors induce naturally 3-Leibniz algebras. Next, we construct an $L_{\infty}$-algebra whose…

Rings and Algebras · Mathematics 2025-09-15 Wen Teng

In this paper, for given an algebraic theory $T$ whose category $C$ of models is semi-abelian, we consider the topological models of $T$ called topological $T$-algebras and obtain some results related to the fundamental groups of…

Category Theory · Mathematics 2018-01-29 Osman Mucuk , Serap Demir

There is a well understood way of generating random coverings of a fixed manifold by sampling homomorphisms from the fundamental group of this manifold into the symmetric group. We prove a central limit theorem for the number of connected…

Probability · Mathematics 2026-03-26 Abdelmalek Abdesselam

Let $X$ be a measure space with a measure-preserving action $(g,x) \mapsto g \cdot x$ of an abelian group $G$. We consider the problem of understanding the structure of measurable tilings $F \odot A = X$ of $X$ by a measurable tile $A…

Dynamical Systems · Mathematics 2023-02-28 Jan Grebík , Rachel Greenfeld , Václav Rozhoň , Terence Tao

We prove the local Langlands conjecture for the exceptional group $G_2(F)$ where $F$ is a non-archimedean local field of characteristic zero.

Number Theory · Mathematics 2022-12-20 Wee Teck Gan , Gordan Savin

We show that the Baum-Connes morphism twisted by a non-unitary representation, defined in [GA08], is an isomorphism for a large class of groups satisfying the Baum-Connes conjecture. Such class contains all the real semi-simple Lie groups,…

K-Theory and Homology · Mathematics 2008-04-29 Maria-Paula Gomez-Aparicio