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We give a generalization of the Beurling-Lax theorem both in the complex and quaternionic settings. We consider in the first case functions meromorphic in the right complex half-plane, and functions slice hypermeromorphic in the right…

Functional Analysis · Mathematics 2015-09-22 Daniel Alpay , Irene Sabadini

A conjecture of May states that there is an up-to-adjunction strictification of symmetric bimonoidal functors between bipermutative categories. The main result of this paper proves a weaker form of May's conjecture that starts with…

Algebraic Topology · Mathematics 2024-05-20 Donald Yau

In this paper we prove an abstract homomorphism theorem for bilinear multipliers in the setting of locally compact Abelian (LCA) groups. We also provide some applications. In particular, we obtain a bilinear abstract version of K. de…

Functional Analysis · Mathematics 2014-02-10 Salvador Rodríguez-López

We develop a theory of Valuation Hilbert Modules and prove a version of Beurling's theorem for these. Then we apply our version of Beurling's theorem to obtain complete descriptions of the closed invariant subspaces of a number of Hilbert…

Complex Variables · Mathematics 2023-06-23 Charles W. Neville

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

We survey the classical results of the Dirichlet Approximation Theorem.

Classical Analysis and ODEs · Mathematics 2007-05-23 Yong-Cheol Kim

In this paper we improve and complement a result by M\'oricz and Siddiqi \cite{Mor}. In particular, we prove that their estimate of the N\"orlund means with respect to the Vilenkin system holds also without their additional condition.…

Classical Analysis and ODEs · Mathematics 2023-12-06 N. Anakidze , N. Areshidze , L. Baramidze

We construct a finite subgroup of Brauer-Manin obstruction for detecting the existence of integral points on integral models of homogeneous spaces of linear algebraic groups of multiplicative type. As application, the strong approximation…

Number Theory · Mathematics 2012-08-21 Dasheng Wei , Fei Xu

In this paper we prove the pluricomplex counterpart of the Moser-Trudinger and Sobolev inequalities in complex space. We consider these inequalities for plurisubharmonic functions with finite pluricomplex energy, and we estimate the…

Complex Variables · Mathematics 2019-07-09 Per Ahag , Rafal Czyz

Let $\mathfrak g$ be an infinite-dimensional Lie algebra and $G$ be the algebraic completion of its module. Using a geometric interpretation in terms of sewing two Riemann spheres with a number of marked points, we introduce a…

Functional Analysis · Mathematics 2022-08-25 Daniel Levin , Alexander Zuevsky

This paper is concerned with proving some embeddings of the form \begin{equation*} F_{p_{1},q}^{s_{1}}\cdot B_{p_{2},\infty }^{s_{2}}\cdot ...\cdot B_{p_{m},\infty }^{s_{m}}\hookrightarrow F_{p,q}^{s_{1}},\quad m\geq 2. \end{equation*} The…

Functional Analysis · Mathematics 2023-01-10 Douadi Drihem

In this paper we give results about projective embeddings of Riemann surfaces, smooth or nodal, which we apply to the inverse Dirichlet-to-Neumann problem and to the inversion of a Riemann-Klein theorem. To produce useful embeddings, we…

Complex Variables · Mathematics 2013-11-26 Gennadi Henkin , Vincent Michel

In this note, we use the concept of a polynomial ring to give an elementary proof to Cayley-Hamilton Theorem. We also give an elementary proof to Birkhoff theorem on Bi-stochastic matrices.

History and Overview · Mathematics 2019-12-10 Yifan Ren , Tongsuo Wu

We study complex Monge-Ampere equations on Hermitian manifolds, extending classical existence results of Yau and Aubin in the Kahler case, and those of Caffarelli, Kohn, Nirenberg and Spruck for the Dirichlet problem in $C^n$. As an…

Differential Geometry · Mathematics 2009-06-22 Bo Guan , Qun Li

We present an algebraic framework for the computation of low-degree cohomology of a class of bigraded complexes which arise in Poisson geometry around (pre)symplectic leaves. We also show that this framework can be applied to the more…

Symplectic Geometry · Mathematics 2019-03-06 Andrés Pedroza , Eduardo Velasco-Barreras , Yury Vorobiev

In this paper, we study the bicomplex version of the Paley-Weiner theorem and the Cauchy integral formula in the upper half-plane.

Functional Analysis · Mathematics 2023-05-09 Sanjay Kumar , Stanzin Dolkar

In this sequel to arxiv:arXiv:1012.0835 we develop Bezout type theorems for semidegrees (including an explicit formula for {\em iterated semidegrees}) and an inequality for subdegrees. In addition we prove (in case of surfaces) a Bernstein…

Algebraic Geometry · Mathematics 2011-11-03 Pinaki Mondal

We prove Ibukiyama's conjectures on Siegel modular forms of half-integral weight and of degree 2 by using Arthur's multiplicity formula on the split odd special orthogonal group $\SO_5$ and Gan-Ichino's multiplicity formula on the…

Number Theory · Mathematics 2021-05-06 Hiroshi Ishimoto

Recently, Mursaleen et al applied (p,q)-calculus in approximation theory and introduced (p,q)-analogue of Bernstein operators in [16]. In this paper, we construct and introduce a generalization of the bivariate Bleimann-Butzer-Hahn…

Classical Analysis and ODEs · Mathematics 2015-06-09 M. Mursaleen , Md. Nasiruzzaman

Motivated by the Poisson Dixmier-Moeglin equivalence problem, a systematic study of commutative unitary rings equipped with a {\em biderivation}, namely a binary operation that is a derivation in each argument, is here begun, with an eye…

Commutative Algebra · Mathematics 2021-11-08 Omar Leon Sanchez , Rahim Moosa