Results 21 to 30 of about 5,364,433 (202)
Entire solutions for several general quadratic trinomial differential difference equations
Open 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
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Nevanlinna analytic continuation for Migdal–Eliashberg theory
Computational Materials TodayIn 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
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The q-Difference Theorems for Meromorphic Functions of Several Variables
Abstract 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
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Nevanlinna functions in the theory of amplification
, 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
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Value Distribution for a Class of Small Functions in the Unit Disk
International Journal of Mathematics and Mathematical Sciences, 2011 If 𝑓 is a meromorphic function in the complex plane, R. Nevanlinna noted that its characteristic function 𝑇(𝑟,𝑓) could be used to categorize 𝑓 according to its rate of growth as |𝑧|=𝑟→∞. Later H.
Paul A. Gunsul
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Advances in Difference Equations, 2021 This paper is concerned with description of the existence and the forms of entire solutions of several second-order partial differential-difference equations with more general forms of Fermat type.
Hong Yan Xu +3 more
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Predicting Geomagnetic Activity in the Ascending and Declining Phases of the Solar Cycle
Space Weather, Volume 24, Issue 8, August 2026.Abstract Most predictions of space climate, that is, the long‐term behavior of the solar‐terrestrial environment, have focused on forecasting the 11‐year sunspot cycle. Geomagnetic activity, on the other hand, has mainly been predicted in shorter, space weather timescales of up to days to weeks.
Timo Qvick +2 more
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Neovius-Nevanlinna – erään suvun kronikka
, 2022 Varhaisimmat Neovius-Nevanlinna -suvun jäsenet olivat maanviljelijöitä Hämeen Rengossa 1600-luvulla. Eräät heistä lähtivät Turun Katedraalikouluun pappisoppiin isovihan jälkeen 1700-luvulla.
Nevanlinna, Heikki
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Oppenheim–Schur inequalities for causal products
Bulletin of the London Mathematical Society, Volume 58, Issue 6, June 2026.Abstract We establish a class of Oppenheim–Schur‐type inequalities for the convolutional Jury product of positive semidefinite matrices. These results extend the classical Schur and Oppenheim inequalities associated with the Hadamard product to a causal convolutional setting.
Dominique Guillot +2 more
wiley +1 more source
Modular version of Nevanlinna theory
, 2022 Fundamental Theorem of Algebra implies that every degree $d$ polynomial with complex coefficient takes value $a \in \mathbb{C}$ exactly $d$ times, counting multiplicity. One also knows the growth of polynomial is governed by its degree $d$.
曾鍵明, Tsang, Kin Ming
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