Results 41 to 50 of about 5,956,521 (263)

Results on the solutions of several second order mixed type partial differential difference equations

open access: yesAIMS Mathematics, 2022
This article is concerned with the existence of entire solutions for the following complex second order partial differential-difference equation $ \left(\frac{\partial^2 f(z_1, z_2)}{\partial z_1^2}+\frac{\partial^2 f(z_1, z_2)}{\partial z_2^2 ...
Wenju Tang, Keyu Zhang, Hongyan Xu
doaj   +1 more source

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

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

Meromorphic solutions of $ f^{n}+P_{d}(f) = p_{1}e^{\alpha_{1}z}+p_{2}e^{\alpha_{2}z}+p_{3}e^{\alpha_{3}z} $

open access: yesAIMS Mathematics, 2022
By using Nevanlinna of the value distribution of meromorphic functions, we investigate the transcendental meromorphic solutions of the non-linear differential equation $ \begin{equation*} f^{n}+P_{d}(f) = p_{1}e^{\alpha_{1}z}+p_{2}e^{\alpha_{2}z}+p_{3}
Linkui Gao, Junyang Gao
doaj   +1 more source

Entire solutions of two certain types of quadratic trinomial q-difference differential equations

open access: yesAIMS Mathematics, 2023
The main purpose of this paper is to find the explicit forms for entire solutions of two certain types of Fermat-type q-difference differential equations.
Zhenguang Gao, Lingyun Gao , Manli Liu
doaj   +1 more source

The growth of entire solutions of certain nonlinear differential-difference equations

open access: yesAIMS Mathematics, 2022
This paper is concerned with entire solutions of nonlinear differential-difference equations. We will characterize the growth of entire solutions for two classes of nonlinear differential-difference equations.
Wenjie Hao, Qingcai Zhang
doaj   +1 more source

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

Some cubic birth and death processes and their related orthogonal polynomials [PDF]

open access: yes, 2005
The orthogonal polynomials with recurrence relation \[(\la\_n+\mu\_n-z) F\_n(z)=\mu\_{n+1} F\_{n+1}(z)+\la\_{n-1} F\_{n-1}(z)\] with two kinds of cubic transition rates $\la\_n$ and $\mu\_n,$ corresponding to indeterminate Stieltjes moment problems, are ...
Andreas Ruffing   +4 more
core   +6 more sources

Tropical Nevanlinna theory and second main theorem

open access: yes, 2009
We present a version of the tropical Nevanlinna theory for real-valued, continuous, piecewise linear functions on the real line. In particular, a tropical version of the second main theorem is proved.
Laine, Ilpo, Tohge, Kazuya
core   +1 more source

The q-Difference Theorems for Meromorphic Functions of Several Variables

open access: yesAbstract and Applied Analysis, 2014
We investigate q-shift analogue of the lemma on logarithmic derivative of several variables. Let f be a meromorphic function in ℂn of zero order such that f(0)≠0, ∞, and let q∈ℂn\{0}.
Zhi-Tao Wen
doaj   +1 more source

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