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This paper presents a systematic study for analytic aspects of Fourier-Zernike series of convolutions of functions supported on disks. We then investigate different aspects of the presented theory in the cases of zero-padded functions.

Functional Analysis · Mathematics 2018-10-31 Arash Ghaani Farashahi , Gregory S. Chirikjian

In this paper we discuss approximation of partially smooth functions. The problem arises naturally in the study of laminated currents.

Dynamical Systems · Mathematics 2015-06-26 John Fornaess , Yinxia Wang , Erlend Fornaess Wold

A recent proposal of new sets of squeezed states is seen as a particular case of a general context admitting realistic physical Hamiltonians. Such improvements reveal themselves helpful in the study of associated squeezing effects.…

Quantum Physics · Physics 2025-10-29 J. Beckers , N. Debergh , F. H. Szafraniec

The fuzzy disc is a matrix approximation of the functions on a disc which preserves rotational symmetry. In this paper we introduce a basis for the algebra of functions on the fuzzy disc in terms of the eigenfunctions of a properly defined…

High Energy Physics - Theory · Physics 2009-11-11 Fedele Lizzi , Patrizia Vitale , Alessandro Zampini

In this paper we show how the superquadratic functions can be used as a tool for researching other types of convex functions like $\phi $-convexity, strong-convexity and uniform convexity. We show how to use inequalities satisfied by…

Functional Analysis · Mathematics 2024-08-15 Shoshana Abramovich

We study sets $V$ in the tridisc that are relatively polynomially convex and have the polynomial extension property. If $V$ is one-dimensional, and is either algebraic, or has polynomially convex projections, we show that it is a retract.…

Complex Variables · Mathematics 2017-11-29 Lukasz Kosinski , John McCarthy

In this paper we survey many results on the Dirichlet space of analytic functions. Our focus is more on the classical Dirichlet space on the disc and not the potential generalizations to other domains or several variables. Additionally, we…

Complex Variables · Mathematics 2011-09-13 Nicola Arcozzi , Richard Rochberg , Eric Sawyer , Brett Wick

This paper introduces the classically successful theory of Toeplitz operators on the Hardy space over the unit disk to a new domain in $\mathbb C^d$ -- the symmetrized polydisk.

Functional Analysis · Mathematics 2021-03-31 Bata Krishna Das , Haripada Sau

Characteristic functions of linear operators are analytic functions that serve as complete unitary invariants. Such functions, as long as they are built in a natural and canonical manner, provide representations of inner functions on a…

Functional Analysis · Mathematics 2025-02-04 Ramlal Debnath , Deepak K. Pradhan , Jaydeb Sarkar

A collection of algorithms is described for numerically computing with smooth functions defined on the unit disk. Low rank approximations to functions in polar geometries are formed by synthesizing the disk analogue of the double Fourier…

Numerical Analysis · Mathematics 2017-03-28 Heather Wilber , Alex Townsend , Grady Wright

We establish plurisubharmonicity of the envelope of Poisson and Lelong functionals on almost complex manifolds. That is, we generalize the corresponding results for complex manifolds and almost complex manifolds of complex dimension two. We…

Complex Variables · Mathematics 2015-07-27 Florian Bertrand , Uros Kuzman

In this article, we further explore convex functions by revealing new bounds, resulting from stronger convexity behavior. In particular, we define the so called radical convex functions and study their properties. We will see that such…

Functional Analysis · Mathematics 2020-10-13 Mohammad Sababheh , Hamid Reza Moradi

We define two new BMOA type analytic function spaces in polydisk. We provide several new results concerning coefficient multipliers of these two new BMOA analytic function spaces in polydisc. Our results extend previously known assertions.

Complex Variables · Mathematics 2025-09-24 Romi F. Shamoyan

In this paper we introduce new generalizations of the zeta function, the Tricomi functions; their main properties are studied. This opens the way to a deeper, better application of these functions both in the theory of special functions,…

Classical Analysis and ODEs · Mathematics 2018-01-01 N. Virchenko , A. Ponomarenko

In this paper, we introduce a subclass of close-to-convex functions defined in the open unit disk. We obtain the inclusion relationships, coefficient estimates and Fekete-Szego inequality. The results presented here would provide extension…

Complex Variables · Mathematics 2016-06-02 Yao Liang Chung , See Keong Lee , Maisarah Haji Mohd

Motivated by existing results, we present some completely monotonic functions involving the polygamma functions.

Classical Analysis and ODEs · Mathematics 2010-12-03 Peng Gao

Analytic approximations of functions of Cayley-Dickson variables are investigated. The case of functions of complexified Cayley-Dickson variables is also encompassed. Moreover, extensions of functions of Cayley-Dickson variables are…

Complex Variables · Mathematics 2018-10-30 S. V. Ludkowski

Cyclotomic polylogarithms are reviewed and new results concerning the special constants that occur are presented. This also allows some comments on previous literature results using PSLQ.

High Energy Physics - Theory · Physics 2017-12-25 Jakob Ablinger , Johannes Blumlein , Mark Round , Carsten Schneider

The purpose of this article is twofold. The first aim is to characterize $h$-extendibility of smoothly bounded pseudoconvex domains in $\mathbb C^{n+1}$ by their noncompact automorphism groups. Our second goal is to show that if the…

Complex Variables · Mathematics 2019-12-25 Ninh Van Thu , Nguyen Quang Dieu

This study examines the transverse and longitudinal properties of hard disks confined in narrow channels. Employing an exact mapping of the system onto a one-dimensional polydisperse, nonadditive mixture of hard rods with equal chemical…

Soft Condensed Matter · Physics 2024-08-13 Ana M. Montero , Andrés Santos