Results 21 to 30 of about 6,490,162 (222)

On the equation fn + (f″)m ≡ 1

open access: yesDemonstratio Mathematica, 2023
Let nn and mm be two positive integers, and the second-order Fermat-type functional equation fn+(f″)m≡1{f}^{n}+{({f}^{^{\prime\prime} })}^{m}\equiv 1 does not have a nonconstant meromorphic solution in the complex plane, except (n,m)∈{(1,1),(1,2),(1,3 ...
Dang Guoqiang
doaj   +1 more source

On the differentiability of T(r,f)

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1982
It is well known that T(r,f) is differentiable at least for r>r0. We show that, in fact, T(r,f) is differentiable for all but at most one value of r, and if T(r,f) fails to have a derivative for some value of r, then f is a constant times a quotient of ...
Douglas W. Townsed
doaj   +1 more source

Some Properties of Meromorphic Solutions of Systems of Complex q-Shift Difference Equations

open access: yesAbstract and Applied Analysis, 2013
In view of Nevanlinna theory, we study the properties of meromorphic solutions of systems of a class of complex difference equations. Some results obtained improve and extend the previous theorems given by Gao.
Hong-Yan Xu   +2 more
doaj   +1 more source

Uniqueness of L-Functions Concerning Certain Differential Polynomials

open access: yesDiscrete Dynamics in Nature and Society, 2018
Relying on Nevanlinna theory and the properties of L-functions in the extended Selberg class, we mainly study the uniqueness problems on L-functions concerning certain differential polynomials. This generalizes some results of Steuding, Li, Fang, and Liu-
Wen-Jie Hao, Jun-Fan Chen
doaj   +1 more source

Robust Controller Design Using the Nevanlinna-Pick Interpolation in Gyro Stabilized Pod

open access: yesDiscrete Dynamics in Nature and Society, 2010
The sensitivity minimization of feedback system is solved based on the theory of Nevanlinna-Pick interpolation with degree constraint without using weighting functions. More details of the dynamic characteristic of second-order system investigated, which
Bin Liu   +3 more
doaj   +1 more source

Entire solutions for several general quadratic trinomial differential difference equations

open access: yesOpen Mathematics, 2021
This paper is devoted to exploring the existence and the forms of entire solutions of several quadratic trinomial differential difference equations with more general forms.
Luo Jun, Xu Hong Yan, Hu Fen
doaj   +1 more source

Singular Schroedinger operators as self-adjoint extensions of n-entire operators [PDF]

open access: yes, 2015
We investigate the connections between Weyl-Titchmarsh-Kodaira theory for one-dimensional Schr\"odinger operators and the theory of $n$-entire operators.
Silva, Luis O.   +2 more
core   +2 more sources

From asymptotics to spectral measures: determinate versus indeterminate moment problems [PDF]

open access: yes, 2005
In the field of orthogonal polynomials theory, the classical Markov theorem shows that for determinate moment problems the spectral measure is under control of the polynomials asymptotics.
Valent, Galliano
core   +5 more sources

Tropical variants of some complex analysis results

open access: yes, 2016
Tropical Nevanlinna theory studies value distribution of continuous piecewise linear functions of a real variable. In this paper, we use the reasoning from tropical Nevanlinna theory to present tropical counterparts of some classical complex results ...
Laine, Ilpo, Liu, Kai, Tohge, Kazuya
core   +1 more source

Curves in Hilbert modular varieties [PDF]

open access: yes, 2018
We prove a boundedness-theorem for families of abelian varieties with real multiplication. More generally, we study curves in Hilbert modular varieties from the point of view of the Green Griffiths-Lang conjecture claiming that entire curves in complex ...
Rousseau, Erwan, Touzet, Frédéric
core   +2 more sources

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