Results 71 to 80 of about 642 (133)

On meromorphic harmonic starlike functions with missing coefficients

, 2009
In this paper, we introduce a new class of meromorphic harmonic starlike functions with missing coefficients in the punctured unit disk $U^\ast$ = {z : 0 < |z| < 1}. We obtain coefficient inequalities, a distortion theorem and a closure theorem. In addition, we investigate some properties of this class.
BOSTANCİ, Hakan, ÖZTÜRK, Metin
openaire   +3 more sources

Convolution Properties of Meromorphic $\mathcal{P}$-Valent Functions with Coefficients of Alternating Type Defined Using $\mathfrak{q}$-Difference Operator

Mathematics
Certain characteristics of univalent functions with negative coefficients of the form f(z)=z−∑n=1∞a2nz2n,a2n>0 have been studied by Silverman and Berman.
Norah Saud Almutairi, Awatef Shahen, Adriana Cătaş, Hanan Darwish   +3 more
doaj   +1 more source

Ruscheweyh-type meromorphic harmonic functions

Journal of Inequalities and Applications
In this paper, we study classes of meromorphic harmonic functions defined by Ruscheweyh derivatives. In addition to finding certain analytic criteria, we obtain radii of starlikeness and convexity, and some topological properties for the defined classes ...
J. Dziok
doaj   +1 more source

On meromorphic starlike functions [PDF]

Pacific Journal of Mathematics, 1963
openaire   +2 more sources

Coefficient Bounds for Certain Classes of Meromorphic Functions

Journal of Inequalities and Applications, 2008
Sharp bounds for are derived for certain classes and of meromorphic functions defined on the punctured open unit disk for which and , respectively, lie in a region starlike with respect to 1 and symmetric with respect to the real axis.
Suchithra K, Gangadharan A, Stephen BAdolf, Silverman H   +3 more
doaj  

Meromorphic starlike functions

Rocky Mountain Journal of Mathematics, 1981
Eenigenburg, Paul J., Livingston, Albert E   +1 more
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About an integral operator preserving meromorphic starlike functions

Bulletin of the Belgian Mathematical Society - Simon Stevin, 1997
Let \(\Sigma_k\), \(k\geq 0\), denote the class of meromorphic functions of the form \(f(z)= {1\over z}+ a_kz^k+ \dots\), in the unit disk \(s=\{z: | z|
openaire   +3 more sources

Meromorphic starlike multivalent functions [PDF]

Transactions of the American Mathematical Society, 1963
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On Some Problems of James Miller

Cubo, 2010
We consider the class of meromorphic univalent functions having a simple pole at and that map the unit disc onto the exterior of a domain which is starlike with respect to a point . We denote this class of functions by .
B Bhowmik, S Ponnusamy, K.-J Wirths
doaj  

Majorization problems for two subclasses of analytic functions connected with the Liu-Owa integral operator and exponential function. [PDF]

J Inequal Appl, 2018
Tang H, Deng G.
europepmc   +1 more source