Results 81 to 90 of about 2,859 (232)

a*-families of analytic functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1984
Using convolutions, a new family of analytic functions is introduced. This family, called a*-family, serves in certain situations to unify the study of many previously well known classes of analytic functions like multivalent convex, starlike, close-to ...
G. P. Kapoor, A. K. Mishra
doaj   +1 more source

Hankel and Toeplitz Determinants for a Subclass of q-Starlike Functions Associated with a General Conic Domain

open access: yesMathematics, 2019
By using a certain general conic domain as well as the quantum (or q-) calculus, here we define and investigate a new subclass of normalized analytic and starlike functions in the open unit disk U .
Hari M. Srivastava   +4 more
doaj   +1 more source

On a class of meromorphic p-valent starlike functions involving certain linear operators

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
Let ∑p be the class of functions f(z) which are analytic in the punctured disk 𝔼*={z∈ℂ ...
Jin-Lin Liu, Shigeyoshi Owa
doaj   +1 more source

Criteria for Strongly Starlike Functions [PDF]

open access: yesISRN Geometry, 2011
Let f(z) be analytic in the unit disk U={z:|z|<1} with f(0)=f'(0)-1=0 and (f(z)/z)f'(z)≠0. By using the method of differential subordinations, we determine the largest number α(β,λ,μ,m) such that, for some β,λ,μ, and m, the differential subordination λzf'(z)/f(z)1-μ1+(zf''(z)/f'(z))-zf'(z)/f(z)+zf'(z)/f(z)m≺1+z/1-zα(β,λ,μ,m)(z∈U) implies zf'(z)/f(z)≺
openaire   +2 more sources

Certain subclasses of starlike functions, II

open access: yesJournal of Mathematical Analysis and Applications, 1991
See the preview in Zbl 0724.30007.
Srivastava, H.M., Owa, Shigeyoshi
openaire   +1 more source

Subclasses of uniformly starlike functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
We study subclasses of the class of uniformly starlike functions which were recently introduced by A.W. Goodman. One new subclass is defined and it is shown that it shares many properties of the parent class.
Ed Merkes, Mohammad Salmassi
doaj   +1 more source

On starlike harmonic functions

open access: yes, 2019
Uniformly starlike univalent functions introduced by Goodman and we develop this idea over harmonic functions. We introduce a subclass of harmonic univalent functions which are fully starlike and uniformly starlike also. In the following we will mention some examples of this subclass and obtain two necessary and sufficient conditions, one with the ...
NOSRATİ, S., ZİREH, A.
openaire   +2 more sources

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