Results 21 to 30 of about 468 (53)
International Journal of Mathematics and Mathematical Sciences, Volume 23, Issue 12, Page 819-825, 2000., 2000 We investigate a family that connects various subclasses of functions convex in the unit disk. We also look at generalized sequences for this family.
Thomas Rosy +3 more
wiley +1 more source
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2015 In this paper we have introduced and studied the subclass ℛ𝒥 (d, α, β) of univalent functions defined by the linear operator RIn,λ,lγf(z)$RI_{n,\lambda ,l}^\gamma f(z)$ defined by using the Ruscheweyh derivative Rnf(z) and multiplier transformation I (n,
Alb Lupaş Alina
doaj +1 more source
On certain sufficient conditions for starlikeness
International Journal of Mathematics and Mathematical Sciences, Volume 23, Issue 8, Page 521-527, 2000., 2000 We consider certain properties of f(z)f″(z)/f′2(z) as a sufficient condition for starlikeness.
Nikola Tuneski
wiley +1 more source
Bounds on the Third Order Hankel Determinant for Certain Subclasses of Analytic Functions
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017 Let A be the class of analytic functions f(z) in the unit disc ∆ = {z ∈ C : |z| < 1g with the Taylor series expansion about the origin given by f(z) = z+ ∑n=2∞ anzn, z ∈∆ : The focus of this paper is on deriving upper bounds for the third order Hankel ...
Vijayalakshmi S.P. +3 more
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Univalence criterion for meromorphic functions and Loewner chains
, 2011 The object of the present paper is to obtain a more general condition for univalence of meromorphic functions in the U*. The significant relationships and relevance with other results are also given.
Becker +13 more
core +1 more source
Some sufficient conditions for strongly starlikeness
International Journal of Mathematics and Mathematical Sciences, Volume 24, Issue 9, Page 643-647, 2000., 2000 We consider strongly starlikeness of order α of functions f(z) = z + an+1zn+1 + ⋯ which are analytic in the unit disc and satisfy the condition of the form |f′(z)(zf(z))1+μ−1|<λ, 0101<μ<, <λ< .
Milutin Obradović, Shigeyoshi Owa
wiley +1 more source
A subordination theorem for spirallike functions
International Journal of Mathematics and Mathematical Sciences, Volume 24, Issue 7, Page 433-435, 2000., 2000 We prove a subordination relation for a subclass of the class of λ‐spirallike functions.
Sukhjit Singh
wiley +1 more source
Second Hankel determinant for a class of analytic functions defined by q-derivative operator
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2019 In this paper, we obtain the estimates for the second Hankel determinant for a class of analytic functions defined by q-derivative operator and subordinate to an analytic function.
Răducanu Dorina
doaj +1 more source
On Integral Means for Fractional Calculus Operators of Multivalent Functions [PDF]
, 2006 2000 Mathematics Subject Classification: Primary 30C45, Secondary 26A33, 30C80Integral means inequalities are obtained for the fractional derivatives and the fractional integrals of multivalent functions.
Owa, Shigeyoshi +2 more
core
Journal of Function Spaces, Volume 2025, Issue 1, 2025.This article investigates the upper bounds of the second Hankel and Toeplitz determinants for a family of q‐starlike functions defined by a q‐analog integral operator, which is a more general form of the q‐Srivastava‐Attiya operator, and the q‐exponential function eq(z).
Sarem H. Hadi +3 more
wiley +1 more source