Results 21 to 30 of about 4,845,279 (299)

A note on a functional inequality

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
We prove: If r1,…,rk are (fixed) positive real numbers with ∏j=1krj>1, then the only entire solutions φ:ℂ→ℂ of the functional inequality∏j=1k|φ(rjz)|≥(∏j=1krj)|φ(z)|kare φ(z)=czn, where c is a complex number and n is a positive integer.
Horst Alzer
doaj   +1 more source

Analytic Kramer kernels, Lagrange-type interpolation series and de Branges spaces [PDF]

open access: yes, 2011
The classical Kramer sampling theorem provides a method for obtaining orthogonal sampling formulas. In particular, when the involved kernel is analytic in the sampling parameter it can be stated in an abstract setting of reproducing kernel Hilbert spaces
Hernández-Medina, Miguel A.   +7 more
core   +1 more source

ON APPLICATIONS OF THE DIHEDRAL GROUP TO INTERPOLATION PROBLEMS FOR ENTIRE FUNCTIONS

open access: yesПроблемы анализа, 2023
We consider a particular case of the dihedral group of rotations and study linear poly-element functional equations associated with that group. We search for a solution in the class of functions that are holomorphic in the plane with a cut along “half”
Garif’yanov F. N., Strezhneva E. V.
doaj   +1 more source

Uniqueness of entire functions

open access: yesJournal of Mathematical Analysis and Applications, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chang, Jianming, Fang, Mingliang
openaire   +1 more source

On location in a half-plane of zeros of perturbed first order entire functions [PDF]

open access: yesMathematica Moravica, 2019
We consider the entire functions h(z) = X∞ k=0 akz k k! and h~(z) = X∞ k=0 a~kz k k! (a0 = ~a0 = 1; z, ak, a~k ∈ C, k = 1, 2, . . .), provided X∞ k=0 |ak| 2 < ∞, X∞ k=0 |a~k| 2 < ∞ and all the zeros of h(z) are in a half-plane.
Gil Michael
doaj  

Uniqueness of Entire Functions

open access: yesAnnals of the Alexandru Ioan Cuza University - Mathematics, 2011
Uniqueness of Entire Functions In this paper, we study the uniqueness problems on meromorphic functions sharing a finite set. The results extend and improve some theorems obtained earlier by Fang (2002) and Zhang-Lin (2008).
Zhang, Yi, Xiong, Wei-Ling
openaire   +2 more sources

On the zeros of the derivatives of an entire function [PDF]

open access: yesProceedings of the American Mathematical Society, 1957
Let f(z) be an entire function. We define the point set L=Lf on the z-sphere as follows: zo0EL if and only if every neighborhood of zo contains zeros of infinitely many of the functions f(n)(z). In [3] Polya has named this set the final set of f, and collected various facts and conjectures about final sets. The object of this paper is to prove that any
Edrei, A., MacLane, G. R.
openaire   +2 more sources

On the Zeta-Function of Zeros of Entire Function [PDF]

open access: yesJournal of Siberian Federal University. Mathematics & Physics, 2021
This article is devoted to the study of the properties of the zeta-function of zeros of entire function. We obtained an explicit expression for the kernel of the integral representation of the zetafunction in one ...
Kuzovatov, Vyacheslav I.   +2 more
openaire   +3 more sources

About the defects of curves holomorphic in the half plane

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1985
A study is made on the defects of curves holomorphic in the half plane. Several results are proved.
Moqbul Hossain
doaj   +1 more source

ON THE UNIQUENESS OF ENTIRE FUNCTIONS

open access: yesBulletin of the Korean Mathematical Society, 2004
Summary: We study the uniqueness of entire functions and prove the following result: Let \(f(z)\) and \(g(z)\) be two nonconstant entire functions, \(n\geq 7\) a positive integer, and let \(a\) be a nonzero finite complex number. If \(f^n(z)(f(z)-1)f'(z)\) and \(g^n(z)(g(z)-1)g'(z)\) share \(a\) CM, then \(f(z)\equiv g(z)\).
Qiu, Huiling, Fang, Mingliang
openaire   +2 more sources

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