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We define what it means for a proper continuous morphism between groupoids to be Haar system preserving, and show that such a morphism induces (via pullback) a *-morphism between the corresponding convolution algebras. We proceed to provide…

Operator Algebras · Mathematics 2018-03-14 Kyle Austin , Magdalena C. Georgescu

In this note we observe that the notion of an induced representation has an analog for quasi-actions. We then use induced quasi-actions to refine some earlier rigidity results for product spaces.

Group Theory · Mathematics 2008-01-22 Bruce Kleiner , Bernhard Leeb

We define Cartan subgroups in connected locally compact groups, which extends the classical notion of Cartan subgroups in Lie groups. We prove their existence and justify our choice of the definition which differs from the one given by…

Group Theory · Mathematics 2026-04-15 Arunava Mandal , Riddhi Shah

We express the hairy graph complexes computing the rational homotopy groups of long embeddings (modulo immersion) of R^m in R^n as "decorated" graph complexes associated to certain representations of the outer automorphism groups of free…

Algebraic Topology · Mathematics 2017-05-04 Victor Turchin , Thomas Willwacher

We give a survey of recent developments in the investigation of the various local-global conjectures for representations of finite groups.

Representation Theory · Mathematics 2015-12-04 Gunter Malle

The concept of hypergroup is generalization of group, first was introduced by Marty [9]. This theory had applications to several domains. Marty had applied them to groups, algebraic functions and rational functions. M. Krasner has studied…

Group Theory · Mathematics 2025-01-17 M. Shabir , Nayyar Mehmood , Piergiulio Corsini

Long and Moody gave a method of constructing representations of the braid group B_n. We discuss some ways to generalize their construction. One of these gives representations of subgroups of B_n, including the Gassner representation of the…

Geometric Topology · Mathematics 2008-07-21 Stephen Bigelow , Jianjun Paul Tian

This paper is concerned with representations of split orthogonal and quasi-split unitary groups over a nonarchimedean local field which are not generic, but which support a unique model of a different kind, the generalized Bessel model. The…

Representation Theory · Mathematics 2009-09-25 Solomon Friedberg , David Goldberg

In a series of papers published in this Journal (J. Math. Phys.), a discussion was started on the significance of a new definition of projective representations in quaternionic Hilbert spaces. The present paper gives what we believe is a…

High Energy Physics - Theory · Physics 2009-10-30 Stephen L. Adler , G. G. Emch

Induced representations for quantum groups are defined starting from coisotropic quantum subgroups and their main properties are proved. When the coisotropic quantum subgroup has a suitably defined section such representations can be…

Quantum Algebra · Mathematics 2009-10-31 N. Ciccoli

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

Hypercubic groups in any dimension are defined and their conjugate classifications and representation theories are derived. Double group and spinor representation are introduced. A detailed calculation is carried out on the structures of…

High Energy Physics - Lattice · Physics 2015-06-25 Jian Dai , Xing-Chang Song

Classical finite association schemes lead to a finite-dimensional algebras which are generated by finitely many stochastic matrices. Moreover, there exist associated finite hypergroups. The notion of classical discrete association schemes…

Group Theory · Mathematics 2019-05-21 Michael Voit

Using the representation theory of the subgroups SL_2(Z_p) of the modular group we investigate the induced fusion algebras in some simple examples. Only some of these representations lead to 'good' fusion algebras. Furthermore, the…

High Energy Physics - Theory · Physics 2016-09-06 W. Eholzer

We study unitary representations of semidirect products of a compact quantum group with a finite group. We give a classification of all irreducible unitary representations, a description of the conjugate representation of irreducible…

Operator Algebras · Mathematics 2020-09-28 Hua Wang

Analytic properties of right topological groups have been extensively studied in the compact admissible case (i.e when the group has a dense topological center). This was inspired by the existence of a Haar measure on such groups. In this…

Functional Analysis · Mathematics 2019-11-27 Prachi Loliencar

Implicit neural representations (INR) have gained significant popularity for signal and image representation for many end-tasks, such as superresolution, 3D modeling, and more. Most INR architectures rely on sinusoidal positional encoding,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-22 Rajhans Singh , Ankita Shukla , Pavan Turaga

We construct automorphic representations for quasi-split groups $G$ over the function field $F=k(t)$ one of whose local components is an epipelagic representation in the sense of Reeder and Yu. We also construct the attached Galois…

Algebraic Geometry · Mathematics 2014-01-30 Zhiwei Yun

In this paper we show how to construct explicitly induced representations for bicrossproduct Hopf algebras with abelian kernels starting from one-dimensional characters of the commutative sector. We introduce this technique by means of two…

Quantum Algebra · Mathematics 2007-05-23 O. Arratia , M. A. del Olmo

All indecomposable finite-dimensional representations of the homogeneous Galilei group which when restricted to the rotation subgroup are decomposed to spin 0, 1/2 and 1 representations are constructed and classified. These representations…

Mathematical Physics · Physics 2009-11-11 M. de Montigny , J. Niederle , A. G. Nikitin