Results 1 to 10 of about 9,151 (298)

Direct numerical solutions of the SIR and SEIR models via the Dirichlet series approach [PDF]

open access: yesPLoS ONE, 2023
Compartment models are implemented to understand the dynamic of a system. To analyze the models, a numerical tool is required. This manuscript presents an alternative numerical tool for the SIR and SEIR models.
Kiattisak Prathom, Asama Jampeepan
doaj   +3 more sources

On an entire function represented by multiple Dirichlet series [PDF]

open access: diamondMathematica Bohemica, 2021
Consider the space $L$ of entire functions represented by multiple Dirichlet series that becomes a non uniformly convex Banach space which is also proved to be dense, countable and separable.
Lakshika Chutani
doaj   +2 more sources

Dirichlet Series and Convolution Equations

open access: bronzePublications of the Research Institute for Mathematical Sciences, 1988
There are two main methods to study analytic continuation properties of Dirichlet series \[ f(s)=\sum_{n\geq 1}a_ ne^{\lambda_ ns}\quad with\quad finite\quad density, \] i.e., \(n/\lambda_ n=0(1)\). One is due to Hadamard and consists of the use of entire functions \(\gamma\) that interpolate the values \(a_ n\) at the points \(z=\lambda_ n\) (cf ...
Carlos A. Berenstein, Daniele C. Struppa
openalex   +4 more sources

STABILITY-PRESERVING PERTURBATION OF THE MAXIMAL TERMS OF DIRICHLET SERIES

open access: yesПроблемы анализа, 2022
We study stability of the maximal term of the Dirichlet series with positive exponents, the sum of which is an entire function. This problem is of interest, because the Leont’ev formulas for coefficients calculated using a biorthogonal system of ...
A. M. Gaisin, N. N. Aitkuzhina
doaj   +1 more source

Dirichlet series and series with Stirling numbers

open access: yesCubo, 2023
This paper presents a number of identities for Dirichlet series and series with Stirling numbers of the first kind. As coefficients for the Dirichlet series we use Cauchy numbers of the first and second kinds, hyperharmonic numbers, derangement numbers ...
Khristo Boyadzhiev
doaj   +1 more source

Coefficient multipliers on spaces of vector-valued entire Dirichlet series [PDF]

open access: yesMathematica Bohemica, 2017
The spaces of entire functions represented by Dirichlet series have been studied by Hussein and Kamthan and others. In the present paper we consider the space $X$ of all entire functions defined by vector-valued Dirichlet series and study the properties ...
Sharma Akanksha, Girja S. Srivastava
doaj   +1 more source

A Study of the Growth Results for the Hadamard Product of Several Dirichlet Series with Different Growth Indices

open access: yesMathematics, 2022
In this paper, our first purpose is to describe a class of phenomena involving the growth in the Hadamard–Kong product of several Dirichlet series with different growth indices.
Hongyan Xu   +5 more
doaj   +1 more source

Relative Gol’dberg Order and Type of Multiple Entire Dirichlet Series in Terms of Coefficients and Exponents

open access: yesJournal of New Theory, 2021
This paper aims to define and characterize the relative Gol'dberg order and type of a multiple entire Dirichlet series with respect to another multiple entire Dirichlet series in terms of their coefficients and exponents.
Monalisa Middya
doaj   +1 more source

REGULAR GROWTH OF DIRICHLET SERIES OF THE CLASS 𝐷(Φ) ON CURVES OF BOUNDED 𝐾-SLOPE

open access: yesПроблемы анализа, 2023
We study the asymptotic behavior of the sum of en- tire Dirichlet series with positive exponents on curves of a bounded slope going in a certain way to infinity.
N. N. Aitkuzhina   +2 more
doaj   +1 more source

Note to the behavior of the maximal term of Dirichlet series absolutely convergent in half-plane

open access: yesМатематичні Студії, 2021
By $S_0(\Lambda)$ denote a class of Dirichlet series $F(s)=\sum_{n=0}^{\infty}a_n\exp\{s\lambda_n\} (s=\sigma+it)$ with an increasing to $+\infty$ sequence $\Lambda=(\lambda_n)$ of exponents ($\lambda_0=0$) and the abscissa of absolute convergence ...
M.M. Sheremeta
doaj   +1 more source

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