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In this note, a general version of Bessel multipliers in Hilbert $C^*$-modules is presented and then, many results obtained for multipliers are extended. Also the conditions for invertibility of generalized multipliers are investigated in…

Operator Algebras · Mathematics 2018-02-07 Gholamreza Abbaspour Tabadkan , Hessam Hossein-nezhad

We extend the formalism of Hopf cyclic cohomology to the context of braided categories. For a Hopf algebra in a braided monoidal abelian category we introduce the notion of stable anti-Yetter-Drinfeld module. We associate a para-cocyclic…

Quantum Algebra · Mathematics 2009-11-21 Masoud Khalkhali , Arash Pourkia

The aim of this note is to show that the generalized supertrace, constructed in another paper of the author, inducing an isomorphism between the Hochschild homology of a superalgebra and that of the superalgebra of square supermatrices of a…

K-Theory and Homology · Mathematics 2009-05-28 Paul A. Blaga

We give a simple proof of the Emch closing theorem by introducing a new invariant measure on the circle. Special cases of that measures are well-known and have been used in the literature to prove Poncelet's and Zigzag theorems. Some…

Dynamical Systems · Mathematics 2016-10-04 Evgeny A. Avksentyev , Vladimir Yu. Protasov

We prove that the isomorphism problem for group algebras reduces to group algebras over finite extensions of the prime field. In particular, the modular isomorphism problem reduces to finite modular group algebras.

Representation Theory · Mathematics 2023-07-11 Diego García-Lucas , Ángel del Río

One of the benefit properties implied by the extensionality axiom of Hilbert's epsilon calculus is that the calculus becomes complete with respect to the choice structures as semantics. Another implication of the axiom, discussed in the…

Logic · Mathematics 2011-07-14 Zoltan Molnar

We present a unitary approach to the construction of representations and intertwining operators. We apply it to the $C^*$-algebras, groups, Gabor type unitary systems and wavelets. We give an application of our method to the theory of…

Functional Analysis · Mathematics 2007-05-23 Dorin Ervin Dutkay

Suppose that for each n >= 0 we have a representation $M_n$ of the symmetric group S_n. Such sequences arise in a wide variety of contexts, and often exhibit uniformity in some way. We prove a number of general results along these lines in…

Commutative Algebra · Mathematics 2018-02-01 Steven V Sam , Andrew Snowden

We prove that the cyclic chain complex of the categorical coalgebra of singular chains on an arbitrary topological space $X$ is naturally quasi-isomorphic to the $S^1$-equivariant chains of the free loop space of $X$. This statement does…

Algebraic Topology · Mathematics 2024-03-18 Manuel Rivera , Daniel Tolosa

The Central Limit Theorem for Iterated Functions Systems on the circle is proved. We study also ergodicity of such systems.

Dynamical Systems · Mathematics 2017-08-04 Tomasz Szarek , Anna Zdunik

We give an analytic proof of the norm index theorem $[I_:K^* N(I_L)] =[L:K]$ for cyclic extensions of number fields using spectral theory of the idele class group.

Number Theory · Mathematics 2007-07-11 Rainer Weissauer

The present article contains a short introduction to Modular Theory for von Neumann algebras with a cyclic and separating vector. It includes the formulation of the central result in this area, the Tomita-Takesaki theorem, and several of…

Operator Algebras · Mathematics 2013-04-12 Fernando Lledó

Let $p$ be an odd prime. Denote a Sylow $p$-subgroup of $GL_2(\mathbb{Z}/p^n)$ and $SL_2(\mathbb{Z}/p^n)$ by $S_p(n,GL)$ and $S_p(n,SL)$ respectively. The theory of stable elements tells us that the mod-$p$ cohomology of a finite group is…

Algebraic Topology · Mathematics 2025-06-06 Anja Meyer

We introduce a general version of singular compactness theorem which makes it possible to show that being a $\Sigma$-cotorsion module is a property of the complete theory of the module. As an application of the powerful tools developed…

Representation Theory · Mathematics 2020-03-13 Jan Šaroch , Jan Šťovíček

Popov classified crystallographic complex reflection groups by determining lattices they stabilize. These analogs of affine Weyl groups have infinite order and are generated by reflections about affine hyperplanes; most arise as the…

Combinatorics · Mathematics 2020-04-21 Philip Puente , Anne V. Shepler

In this paper, some of formulations of Hamilton-Jacobi equations for Hamiltonian system on Lie algebroids are given. Here we use the general properties of Lie algebroids to express and prove two geometric version of the Hamilton-Jacobi…

Mathematical Physics · Physics 2019-02-21 Gh. Haghighatdoost , R. Ayoubi

We give explicit isomorphisms between simple modules of degenerate cyclotomic Hecke algebras defined via various cellular bases. A special case gives a generalized Mullineux involution in the degenerate case.

Representation Theory · Mathematics 2023-07-19 Hebing Rui , Linliang Song

In this paper, we generalize the fundamental theorems of functional analysis to the framework of bicomplex topological modules.

Functional Analysis · Mathematics 2011-09-16 Rajeev Kumar , Romesh Kumar , Dominic Rochon

A completeness theorem is proved involving a system of integro-differential equations with some $\lambda$-depending boundary conditions. Also some sufficient conditions for the root functions to form a Riesz basis are established.

Functional Analysis · Mathematics 2013-09-27 Seppo Hassi , Leonid Oridoroga

We explain the precise relationship between two module-theoretic descriptions of sheaves on an involutive quantale, namely the description via so-called Hilbert structures on modules and that via so-called principally generated modules. For…

Category Theory · Mathematics 2009-06-11 Hans Heymans , Isar Stubbe