30c45 - Open Access .click

Results 111 to 120 of about 308 (156)

On some coefficient estimates for a class of p-valent functions [PDF]

In this paper, we consider a class of p-valent functions. For functions in this class, we find sharp estimates for their first three coefficients. Upper bound for the second order, Hankel determinant is also obtained.
RĂDUCANU, Dorina, PROCA, Alexandrina Maria +1 more
core +1 more source

A new family of multivalent functions defined by certain forms of the quantum integral operator

Demonstratio Mathematica
In this work, using the concepts of qq-calculus, we first define the qq-Jung-Kim-Srivastava and qq-Bernardi integral operators for multivalent functions. Then, we use these operators to establish the generalized integral operator ℬq,p−m−λf(z){{\mathcal{ {
Khan Ajmal +5 more
doaj +1 more source

On certain subclasses of meromorphic functions Defined by convolution with positive and fixed second coefficients [PDF]

, 2015
In this paper we consider the class M(f; g; α; β; λ; c) of meromorphic univalent functions defined by convolution with positive coefficients and fixed second coefficients.
AOUF, M.K. +3 more
core

On close-to-convex functions satisfying a differential inequality [PDF]

, 2015
Let C α (β) denote the class of normalized functions f, analytic in the open unit disk E which satisfy the condition… …We claim that our result improves the result of Chichra, P. N. [1].
BILLING, Sukhwinder Singh
core

Estimating coefficients for certain subclasses of meromorphic and bi-univalent functions. [PDF]