Results 11 to 20 of about 2,822,582 (218)

Convex and starlike criteria [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1999
We investigate an expression involving the quotient of the analytic representations of convex and starlike functions. Sufficient conditions are found for functions to be starlike of a positive order and convex.
Herb Silverman
doaj   +2 more sources

Some General Classes of q-Starlike Functions Associated with the Janowski Functions [PDF]

open access: yesSymmetry, 2019
By making use of the concept of basic (or q-) calculus, various families of q-extensions of starlike functions of order α in the open unit disk U were introduced and studied from many different viewpoints and perspectives. In this paper,
Qazi Zahoor Ahmad   +2 more
exaly   +2 more sources

Third Hankel Determinant for the Logarithmic Coefficients of Starlike Functions Associated with Sine Function

open access: yesFractal and Fractional, 2022
The logarithmic functions have been used in a verity of areas of mathematics and other sciences. As far as we know, no one has used the coefficients of logarithmic functions to determine the bounds for the third Hankel determinant.
Bilal Khan   +3 more
doaj   +3 more sources

The Generalized Janowski Starlike and Close-to-Starlike Log-Harmonic Mappings

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2011
Motivated by the success of the Janowski starlike function, we consider here closely related functions for log-harmonic mappings of the form 𝑓(𝑧)=𝑧ℎ(𝑧)𝑔(𝑧) defined on the open unit disc 𝑈.
Maisarah Haji Mohd, Maslina Darus
doaj   +2 more sources

Starlike Functions Related to the Bell Numbers

open access: yesSymmetry, 2019
The present paper aims to establish the first order differential subordination relations between functions with a positive real part and starlike functions related to the Bell numbers. In addition, several sharp radii estimates for functions in the class
Virendra Kumar   +2 more
exaly   +2 more sources

Certain integral operator and strongly starlike functions [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
Let S∗(ρ,γ) denote the class of strongly starlike functions of order ρ and type γ and let C(ρ,γ) be the class of strongly convex functions of order ρ and type γ. By making use of an integral operator defined by Jung et al.
Jin-Lin Liu
doaj   +2 more sources

A Two-Parameter Subclass of q-Starlike Functions Associated With 1−sinz/cosz

open access: yesJournal of Function Spaces
Using the real parameters λ and τ with −1 ...
Nehad Ali Shah   +3 more
doaj   +2 more sources

Subclasses of uniformly starlike functions [PDF]

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   +2 more sources

Quantitative Analysis of Polymers by MALDI-TOF Mass Spectrometry: Correlation Between Signal Intensity and Arm Number. [PDF]

open access: yesJ Mass Spectrom
ABSTRACT The signal intensities of linear and star‐shaped poly(L‐lactides) (PLA) and poly (ethylene oxides) (PEO) were compared to determine the influence of the number of arms on the ionization in matrix‐assisted laser desorption/ionization time‐of‐flight (MALDI‐TOF) mass spectrometry. In this study, a variety of blends were prepared and investigated,
Dalgic MS, Kumar S, Weidner SM.
europepmc   +2 more sources

A certain class of starlike functions

open access: yesComputers & Mathematics with Applications, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Janusz Sokół
openaire   +5 more sources

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