Results 21 to 30 of about 958 (219)

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

Ax–Schanuel type theorems on functional transcendence via Nevanlinna theory [PDF]

open access: yes, 2022
In this paper, we apply Nevanlinna theory to prove two Ax–Schanuel type theorems for functional transcendence when the original exponential map is replaced by other meromorphic functions. We give examples to show that these results are optimal.
HUANG, J, Ng, TW
core   +1 more source

Nevanlinna functions in the theory of amplification [PDF]

open access: yes, 2020
We know that the Nevanlinna (Herglotz) functions arise in physics in a fundamental way as an alternative representation of causality. We have discovered recently that they also relevant to the amplification phenomenon occurring in traveling wave tubes ...
Figotin, Alexander
core  

An Evertse–Ferretti Nevanlinna constant and its consequences [PDF]

open access: yes, 2021
In this paper, we introduce the notion of an Evertse–Ferretti Nevanlinna constant and compare it with the birational Nevanlinna constant introduced by the authors in a recent joint paper. We then use it to recover several previously known results.
Ru, Min, Vojta, Paul
core   +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

Nevanlinna-type theory based on heat diffusion [PDF]

open access: yes, 2022
We obtain an analogue of Nevanlinna theory of holomorphic mappings from a complete and stochastically complete K\"ahler manifold into a complex projective manifold.
Dong, Xianjing
core   +1 more source

From Herglotz-Nevanlinna to Quasi-Herglotz [PDF]

open access: yes, 2020
In this overview talk will deal with generalizations of Herglotz-Nevanlinna functions . We will start with some updates concerning functions in several variables and then consider generalizations (still in only one variable though) that are not any more ...
Luger, Annemarie
core  

Nevanlinna analytic continuation for Migdal–Eliashberg theory

open access: yesComputational Materials Today
In this work, we present a method to reconstruct real-frequency properties from analytically continued causal Green’s functions within the framework of Migdal–Eliashberg (ME) theory for superconductivity.
D.M. Khodachenko   +4 more
doaj   +1 more source

An Analogue of Continued Fractions in Number Theory for Nevanlinna Theory [PDF]

open access: yes, 2004
We show an analogue of continued fractions in approximation to irrational numbers by rationals for Nevanlinna theory. The analogue is a sequence of points in the complex plane which approaches a given nite set of points and at a given rate in the sense ...
Ye, Zhuan
core   +2 more sources

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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