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We give a complete analysis of the projective unitary irreducible representations of the Poincar\'e group in 1+2 dimensions applying Mackey theorem and using an explicit formula for the universal covering group of the Lorentz group in 1+2…

High Energy Physics - Theory · Physics 2015-06-26 Dan Radu Grigore

We survey recent results on multiple transitivity of automorphism groups of affine algebraic varieties. We consider the property of infinite transitivity of the special automorphism group, which is equivalent to flexibility of the…

Algebraic Geometry · Mathematics 2023-04-04 Ivan Arzhantsev

We extend the Weil representation of infinite-dimensional symplectic group to a representation a certain category of linear relations.

Representation Theory · Mathematics 2017-03-22 Yury A. Neretin

A notion of Drinfeld polynomials is introduced for modules of two-parameter quantum affine algebras. Finite dimensional representations are then characterized by sets of $l$-tuples of pairs of Drinfeld polynomials with certain conditions.

Quantum Algebra · Mathematics 2015-09-08 Naihuan Jing , Honglian Zhang

Preface (A.Vershik) - about these texts (3.); I.Interpolation between inductive and projective limits of finite groups with applicatons to linear groups over finite fields; II.The characters of the groups of almost triangle matrices over…

Representation Theory · Mathematics 2007-05-25 A. Vershik , S. Kerov

A result of D. Segal states that every complex irreducible representation of a finitely generated nilpotent group $G$ is monomial if and only if $G$ is abelian-by-finite. A conjecture of A. N. Parshin, recently proved affirmatively by I.V.…

Representation Theory · Mathematics 2016-12-04 E. K. Narayanan , Pooja Singla

We classify the finite dimensional irreducible representations of affine Hecke algebras of type B_2 with unequal parameters.

Representation Theory · Mathematics 2007-05-23 Naoya Enomoto

We construct a family of irreducible unitary representations of the loop affine group of a line (ax+b group) with central extension on the Hilbert space of square integrable functions with respect to the Wiener measure. We relate the matrix…

Representation Theory · Mathematics 2012-10-09 Anton M. Zeitlin

We propose and develop a theory that allows to characterize epimorphisms of profinite groups in terms of indecomposable epimorphisms.

Group Theory · Mathematics 2025-09-16 Dan Haran

The irreducible representations of all of the 80 diperiodic groups, being the symmetries of the systems translationally periodical in two directions, are calculated. To this end, each of these groups is factorized as the product of a…

Superconductivity · Physics 2009-10-31 Ivanka Milosevic , B. Nikolic , M. Damnjanovic , Maja Krcmar

We continue the study of glider representations of finite groups $G$ with given structure chain of subgroups $e \subset G_1 \subset \ldots \subset G_d = G$. We give a characterization of irreducible gliders of essential length $e \leq d$…

Representation Theory · Mathematics 2019-10-15 Frederik Caenepeel , Fred Van Oystaeyen

We introduce and study the so-called serpentine representations of the infinite symmetric group $\sinf$, which turn out to be closely related to the basic representation of the affine Lie algebra $\widehat{\mathfrak{sl}_2}$ and…

Representation Theory · Mathematics 2015-06-23 N. Tsilevich , A. Vershik

We introduce unbounded strongly irreducible operators and transitive operators. These operators are related to a certain class of indecomposable Hilbert representations of quivers on infinite-dimensional Hilbert spaces. We regard the theory…

Functional Analysis · Mathematics 2016-03-28 Masatoshi Enomoto , Yasuo Watatani

We investigate the Schr\"odinger representations of certain infinite-dimensional Heisenberg groups, using their corresponding Wigner transforms.

Representation Theory · Mathematics 2016-03-23 Ingrid Beltita , Daniel Beltita , Marius Mantoiu

Given three irreducible, admissible, infinite dimensional complex representations of GL2(F), with F a local field, the space of trilinear functionals invariant by the group has dimension at most one. When it is one we provide an explicit…

Number Theory · Mathematics 2010-05-06 Mladen Dimitrov , Louise Nyssen

Let O be a complete discrete valuation domain with finite residue field. In this paper we describe the irreducible representations of the groups Aut(M) for any finite O-module M of rank two. The main emphasis is on the interaction between…

Representation Theory · Mathematics 2008-08-21 Uri Onn

We develop an invariant deformation theory, in a form accessible to practice, for affine schemes $W$ equipped with an action of a reductive algebraic group $G$. Given the defining equations of a $G$-invariant subscheme $X \subset W$, we…

Algebraic Geometry · Mathematics 2015-03-12 Christian Lehn , Ronan Terpereau

We study infinite groups interpretable in three families of valued fields: $V$-minimal, power bounded $T$-convex, and $p$-adically closed fields. We show that every such group $G$ has unbounded exponent and that if $G$ is dp-minimal then it…

Logic · Mathematics 2024-04-09 Yatir Halevi , Assaf Hasson , Ya'acov Peterzil

We begin the study of the representation theory of the infinite Temperley-Lieb algebra. We fully classify its finite dimensional representations, then introduce infinite link state representations and classify when they are irreducible or…

Quantum Algebra · Mathematics 2022-12-23 Stephen T. Moore

An approach to infinite dimensional integration which unifies the case of oscillatory integrals and the case of probabilistic type integrals is presented. It provides a truly infinite dimensional construction of integrals as linear…

Probability · Mathematics 2016-04-01 Sergio Albeverio , Sonia Mazzucchi