Results 11 to 20 of about 835 (184)

Interval estimation on hyper-order of meromorphic solutions of complex linear differential equations with uncertain coefficients

open access: yesApplied Mathematics in Science and Engineering, 2023
The authors address the complex oscillation problems of all solutions of homogenous linear differential equations with meromorphic coefficients. Sufficient conditions for estimating the growth of meromorphic solution with infinite order have been ...
Zhongwei He, Lingyun Gao
doaj   +1 more source

ON MULTIVALENT HARMONIC MEROMORPHIC FUNCTIONS INVOLVING HYPERGEOMETRIC FUNCTIONS [PDF]

open access: yesالمجلة العراقية للعلوم الاحصائية, 2011
In this paper we introduce a subclass of multivalent harmonic meromorphic functions defined in the exterior of the unit disk by using generalize hypergeometric functions.
ABDULRAHMAN SALMAN JUMA
doaj   +1 more source

Applications‎ ~‎of $Q$-hypergeometric and Hurwitz‎-Lerch Zeta Functions on Meromorphic Functions [PDF]

open access: yesMathematics Interdisciplinary Research, 2023
‎A new subclass of meromorphic univalent functions by using the q-hypergeometric and Hurwitz-Lerch Zeta functions is defined‎. ‎Also‎, ‎by applying the generalized Liu-Srivastava operator on meromorphic functions‎, ‎some geometric properties of the new ...
Seyed Hadi Sayedain Boroujeni   +1 more
doaj   +1 more source

Simple sufficient conditions for starlikeness and convexity for meromorphic functions

open access: yesOpen Mathematics, 2016
In this paper we investigate some extensions of sufficient conditions for meromorphic multivalent functions in the open unit disk to be meromorphic multivalent starlike and convex of order α.
Goswami Pranay   +2 more
doaj   +1 more source

Fekete–Szegö Problems for Certain Classes of Meromorphic Functions Involving q-Al-Oboudi Differential Operator

open access: yesJournal of Mathematics, 2022
In this paper, we introduce a new derivative operator involving q-Al-Oboudi differential operator for meromorphic functions. By using this new operator, we define a new subclass of meromorphic functions and obtain the Fekete–Szegő inequalities.
M.K. Aouf, Fatma Z. El-Emam
doaj   +1 more source

Nonvanishing Meromorphic Univalent Functions [PDF]

open access: yesProceedings of the American Mathematical Society, 1988
This note studies the best constants s s such that the function k ( z ) = z + 2 + 1 / z k(z) = z + 2 + 1/z solves the linear coefficient problems max Re ⁡ { s
Abu-Muhanna, Yusuf, Schober, Glenn
openaire   +2 more sources

Further Results on Uniqueness of Meromorphic Functions concerning Fixed Points

open access: yesAbstract and Applied Analysis, 2014
We will study the uniqueness problems of meromorphic functions of differential polynomials sharing fixed points. Our results improve or generalize some previous results on meromorphic functions sharing fixed points.
Xiao-Bin Zhang
doaj   +1 more source

Meromorphic Functions Sharing a Small Function [PDF]

open access: yesAbstract and Applied Analysis, 2007
We will study meromorphic functions that share a small function, and prove the following result: letf(z)andg(z)be two transcendental meromorphic functions in the complex plane and letn≥11be a positive integer. Assume thata(z)(≢0)is a common small function with respect tof(z)andg(z). Iffnf′andgng′sharea(z)CM, then eitherfn(z)f′(z)gn(z)g′(z)≡a2(z), orf(z)
Wang, Songmin, Gao, Zongsheng
openaire   +4 more sources

Comparative growth analysis of wronskians in the light of their relative orders

open access: yesAnnales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, 2015
In this paper we study the comparative growth properties of a composition of entire and meromorphic functions on the basis of the relative order (relative lower order) of Wronskians generated by entire and meromorphic functions.
Sanjib Kumar Datta   +2 more
doaj   +1 more source

On Some Classes with Norms of Meromorphic Function Spaces Defined by General Spherical Derivatives

open access: yesJournal of Mathematics, 2021
The main concerned target of this article is to define and study some concerned classes of meromorphic function spaces using the general spherical derivatives.
A. El-Sayed Ahmed, S. Attia Ahmed
doaj   +1 more source

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