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We examine regularity and basis properties of the family of rescaled $p$-cosine functions. We find sharp estimates for their Fourier coefficients. We then determine two thresholds, $p_0<2$ and $p_1>2$, such that this family is a Schauder…

Classical Analysis and ODEs · Mathematics 2015-11-05 Lyonell Boulton , Houry Melkonian

Conformal transformations of a Euclidean (complex) plane have some kind of completeness (sufficiency) for the solution of many mathematical and physical-mathematical problems formulated on this plane. There is no such completeness in the…

Mathematical Physics · Physics 2007-05-23 G. I. Garas'ko

Analogues of classical combinatorial identities for elementary and homogeneous symmetric functions with coefficients in Yanigian are discussed. As a corollary, similar relations are deduced for shifted Schur functions.

Quantum Algebra · Mathematics 2010-11-17 Natasha Rozhkovskaya

We study the convexity properties of the generalized trigonometric functions considered as functions of parameter. We show that $p\to\sin_p(y)$ and $p\to\cos_p(y)$ are log-concave on the appropriate intervals while $p\to\tan_p(y)$ is…

Classical Analysis and ODEs · Mathematics 2014-02-17 D. B. Karp , E. G. Prilepkina

Generalized cycles can be thought of as the extension of form-cycle duality between holomorphic forms and cycles, to meromorphic forms and generalized cycles. They appeared as an ubiquitous tool in the study of spectral curves and…

Mathematical Physics · Physics 2024-05-24 B. Eynard

In the present paper we deal with the following generalization of the sine-cosine equation \begin{equation*} \int f_1(x+y-t)+f_2(x-y+t) d\mu(t)=g(x)h(y) \end{equation*} for complex valued functions $f_1$, $f_2$, $g$ and $h$ defined on a…

Functional Analysis · Mathematics 2015-10-13 Ż. Fechner , L. Székelyhidi

The present article is devoted to the description of further investigations of the author of this article. These investigations (in terms of various representations of real numbers) include the generalized Salem functions and…

General Mathematics · Mathematics 2019-10-08 Symon Serbenyuk

We introduce generalized Schur functions and generalized positive functions in setting of slice hyperholomorphic functions and study their realizations in terms of associated reproducing kernel Pontryagin spaces

Complex Variables · Mathematics 2014-11-10 Daniel Alpay , Fabrizio Colombo , Izchak Lewkowicz , Irene Sabadini

Based on two point spline approximations of arbitrary order, a series of functions that define lower bounds for sin(x) and sin(x)/x, over the interval [0,Pi/2], with increasingly low relative errors and smaller relative errors than…

General Mathematics · Mathematics 2020-11-10 Roy M. Howard

The associativity property, usually defined for binary functions, can be generalized to functions of a given fixed arity n>=1 as well as to functions of multiple arities. In this paper, we investigate these two generalizations in the case…

Rings and Algebras · Mathematics 2011-03-02 Miguel Couceiro , Jean-Luc Marichal

Generalized analytic functions over generalized analytic manifolds are build from sums of convergent real power series with non-negative real exponents (and some well-ordering condition on the support). In a paper by Mart\'in-Villaverde,…

Algebraic Geometry · Mathematics 2022-06-23 B. Molina-Samper , J. Palma-Márquez , F. Sanz-Sánchez

Four families of special functions, depending on n variables, are studied. We call them symmetric and antisymmetric multivariate sine and cosine functions. They are given as determinants or antideterminants of matrices, whose matrix…

Classical Analysis and ODEs · Mathematics 2009-11-13 A. Klimyk , J. Patera

In a recent survey, Schmidt compiled equivalences between generalized bent functions, group invariant Butson Hadamard matrices, and abelian splitting relative difference sets. We establish a broader network of equivalences by considering…

Combinatorics · Mathematics 2022-07-13 José Andrés Armario , Ronan Egan , Dane Flannery

Linearization of homogeneous polynomials of degree n and k variables leads to generalized Clifford algebras. Multicomplex numbers are then introduced in analogy to complex numbers with respect to usual Clifford algebra. In turn multicomplex…

High Energy Physics - Theory · Physics 2009-10-31 P. Baseilhac , P. Grangé , M. Rausch de Traubenberg

This paper is devoted for the study of a new generalization of Struve function type. In this paper , We establish four new integral formulas involving the Galue type Struve function, which are express in term of the generalized (Wright)…

Classical Analysis and ODEs · Mathematics 2016-08-11 D. L. Suthar , S. D. Purohit , K. S. Nisar

We investigate the complex Gaussian as well as non-Gaussian distributed random analytical and entire functions (complex entire random field) and calculate their domain of definiteness (radius of convergence) as well as some important…

Complex Variables · Mathematics 2020-11-03 Maria Rosaria Formica , Eugeny Ostrovsky , Leonid Sirota

The aim of the present paper is to give extensions of the cosine-sine functional equation.

Classical Analysis and ODEs · Mathematics 2019-07-25 Omar Ajebbar , Elhoucien Elqorachi

We extend the theory of distributional kernel operators to a framework of generalized functions, in which they are replaced by integral kernel operators. Moreover, in contrast to the distributional case, we show that these generalized…

General Mathematics · Mathematics 2016-08-16 Séverine Bernard , Jean-François Colombeau , Antoine Delcroix

It is known that inner functions exist on strongly pseudoconvex domains. In this paper we will show that they exist on a more general type of domains, including some domains of finite type.

Complex Variables · Mathematics 2011-03-04 Baili Min

We find an unifying approach to the analytic representation of the domain bounded by a generalized Pascal snail. Special cases as Pascal snail, Both leminiscate, conchoid of the Sluze and a disc are included. The behavior of functions…

Complex Variables · Mathematics 2020-04-02 S. Kanas , V. S. Masih