Results 11 to 20 of about 287,992 (171)

Doubly close-to-convex functions

open access: yesJournal of Mathematical Analysis and Applications, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dorff, Michael   +2 more
openaire   +2 more sources

Subclasses of p-Valent Functions Associated with Linear q-Differential Borel Operator

open access: yesMathematics, 2023
The aim of the present paper is to introduce and study some new subclasses of p-valent functions by making use of a linear q-differential Borel operator.We also deduce some properties, such as inclusion relationships of the newly introduced classes and ...
Adriana Cătaş   +2 more
doaj   +1 more source

Data-Driven Chance Constrained Optimization under Wasserstein Ambiguity Sets [PDF]

open access: yes, 2018
We present a data-driven approach for distributionally robust chance constrained optimization problems (DRCCPs). We consider the case where the decision maker has access to a finite number of samples or realizations of the uncertainty.
Cherukuri, Ashish   +2 more
core   +2 more sources

Close-to-Convexity of q-Bessel–Wright Functions

open access: yesMathematics, 2022
In this paper, we aim to find sufficient conditions for the close-to-convexity of q-Bessel–Wright functions with respect to starlike functions, such as z1−z,z1−z2, and −log(1−z) are in the open unit disc. Some consequences related to our main results are
Muhey U. Din   +4 more
doaj   +1 more source

On alpha-close-to-convex functions of order beta

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1986
Let Mβ(α)[α≥0   and   β≥0] denote the class of all functionsf(z)=z+∑n=2∞anznanalytic in the unit disc U with f′(z)f(z)/z≠0 and which satisfy for z=reiθ∈U the condition ∫θ1θ2Re{(1−α)zf′(z)f(z)+α(1+zf″(z)f′(z))}dθ>−βπ for all θ2>θ1.
M. A. Nasr
doaj   +1 more source

A Criterion for Subfamilies of Multivalent Functions of Reciprocal Order with Respect to Symmetric Points

open access: yesFractal and Fractional, 2019
In the present research paper, our aim is to introduce a new subfamily of p-valent (multivalent) functions of reciprocal order. We investigate sufficiency criterion for such defined family.
Shahid Mahmood   +4 more
doaj   +1 more source

Injectivity of sections of convex harmonic mappings and convolution theorems [PDF]

open access: yes, 2015
In the article the authors consider the class ${\mathcal H}_0$ of sense-preserving harmonic functions $f=h+\overline{g}$ defined in the unit disk $|z|
A. W. Goodman   +36 more
core   +2 more sources

The Second Hankel Determinant Problem for a Class of Bi-Close-to-Convex Functions

open access: yesMathematics, 2019
The purpose of the present work is to determine a bound for the functional H 2 ( 2 ) = a 2 a 4 − a 3 2 for functions belonging to the class C Σ of bi-close-to-convex functions.
Nak Eun Cho   +3 more
doaj   +1 more source

Quasi-convex univalent functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1980
In this paper, a new class of normalized univalent functions is introduced. The properties of this class and its relationship with some other subclasses of univalent functions are studied. The functions in this class are close-to-convex.
K. Inayat Noor, D. K. Thomas
doaj   +1 more source

Properties of Spiral-Like Close-to-Convex Functions Associated with Conic Domains

open access: yesMathematics, 2019
In this paper, our aim is to define certain new classes of multivalently spiral-like, starlike, convex and the varied Mocanu-type functions, which are associated with conic domains.
Hari M. Srivastava   +5 more
doaj   +1 more source

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