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We discuss some basic properties of Lie group representations in rigged Hilbert spaces. In particular, we show that a differentiable representation in a rigged Hilbert space may be obtained as the projective limit of a family of continuous…

Mathematical Physics · Physics 2009-11-10 S. Wickramasekara , A. Bohm

By considering appropriate finite covering spaces of closed non-orientable surfaces, we construct linear representations of their mapping class group which have finite index image in certain big arithmetic groups.

Geometric Topology · Mathematics 2014-02-20 Ferit Deniz , Wilhelm Singhof

Deformed gauge transformations on deformed coordinate spaces are considered for any Lie algebra. The representation theory of this gauge group forces us to work in a deformed Lie algebra as well. This deformation rests on a twisted Hopf…

High Energy Physics - Theory · Physics 2008-11-26 Julius Wess

For any countable group, and also for any locally compact second countable, compactly generated topological group, G, we show the existence of a "universal" hypercyclic (i.e. topologically transitive) representation on a Hilbert space, in…

Dynamical Systems · Mathematics 2014-09-19 Eli Glasner , Benjamin Weiss

Using representation theory techniques we prove that various spaces of derivations or one-sided multipliers over certain operator algebras are reflexive. A sample result: any bounded local derivation (local left multiplier) on an…

Operator Algebras · Mathematics 2015-02-10 Elias G. Katsoulis

In this work, we investigate the potential of weights to serve as effective representations, focusing on neural fields. Our key insight is that constraining the optimization space through a pre-trained base model and low-rank adaptation…

Machine Learning · Computer Science 2026-03-05 Zhuoqian Yang , Mathieu Salzmann , Sabine Süsstrunk

We introduce a class of monotone $\sigma$-complete effect algebras, called representable, which are $\sigma$-homomorphic images of a class of monotone $\sigma$-complete effect algebras of functions taking values in the interval $[0,1]$ and…

Mathematical Physics · Physics 2015-06-17 Anatolij Dvurečenskij

We introduce a categorical framework for the study of representations of $G_F$, where $G$ is a reductive group, and $\bF$ is a 2-dimensional local field, i.e. $F=K((t))$, where $K$ is a local field. Our main result says that the space of…

Representation Theory · Mathematics 2007-05-23 D. Gaitsgory , D. Kazhdan

We investigate representations of Coxeter groups into $\mathrm{GL}(n,\mathbb{R})$ as geometric reflection groups which are convex cocompact in the projective space $\mathbb{P}(\mathbb{R}^n)$. We characterize which Coxeter groups admit such…

Group Theory · Mathematics 2024-09-10 Jeffrey Danciger , François Guéritaud , Fanny Kassel , Gye-Seon Lee , Ludovic Marquis

In this article, we introduce the notion of representations of polyadic groups and we investigate the connection between these representations and those of retract groups and covering groups.

Representation Theory · Mathematics 2015-01-27 Wieslaw A. Dudek , Mohammad Shahryari

This paper constructs a representation of a Hecke algebra on a vector space spanned by the involutions in a Coxeter group.

Representation Theory · Mathematics 2012-01-04 George Lusztig , David Vogan

We survey the existing parts of a classification of finite groups generated by orthogonal transformations in a finite-dimensional Euclidean space whose fixed point subspace has codimension one or two and extend it to a complete…

Group Theory · Mathematics 2017-11-02 Christian Lange , Marina A. Mikhailova

We construct irreducible unitary representations of a finitely generated free group which are weakly contained in the left regular representation and in which a given linear combination of the generators has an eigenvalue. When the…

Operator Algebras · Mathematics 2007-05-23 William L. Paschke

We define reflective numbers and their iterative summations. We provide classification of reflective numbers based on their iterative cyclical limits.

Number Theory · Mathematics 2022-12-06 Mahmoud Affouf

We construct finite-dimensional projective representations of the mapping class groups of compact connected oriented surfaces having one boundary component using stated skein algebras.

Quantum Algebra · Mathematics 2022-08-29 Julien Korinman

Quadratic algebras related to the reflection equations are introduced. They are quantum group comodule algebras. The quantum group $F_q(GL(2))$ is taken as the example. The properties of the algebras (center, representations, realizations,…

High Energy Physics - Theory · Physics 2014-11-18 P. P. Kulish , E. K. Sklyanin

We study finite dimensional representations of the projective modular group. Various explicit dimension formulas are given.

Algebraic Geometry · Mathematics 2007-05-23 Arne B. Sletsjoe

The relation between representations and positive definite functions is a key concept in harmonic analysis on topological groups. Recently this relation has been studied on topological groupoids. This is the first in a series of papers in…

Operator Algebras · Mathematics 2007-05-23 Massoud Amini , Alireza Medghalchi

Conjectures of Braverman and Kazhdan, Ng\^o and Sakellaridis have motivated the development of Schwartz spaces for certain spherical varieties. We prove that under suitable assumptions these Schwartz spaces are naturally a representation of…

We construct the augmentation representation. It is a representation of the fundamental group of the link complement associated to an augmentation of the framed cord algebra. This construction connects representations of two link invariants…

Geometric Topology · Mathematics 2022-08-16 Honghao Gao