Yazar "111202" için listeleme

A Certain Class of Harmonic Mappings Related to Functions of Bounded Boundary Rotation
Polatoğlu, Yaşar; Yavuz Duman, Emel; Aydoğan, Melike (Eudoxus Press, Llc, 1424 Beaver Trail Drive, Cordova, Tn 38016 Usa, 201405)Let V(k) be the class of functions with bounded boundary rotation and let SH be the class of sensepreserving harmonic mappings. In the present paper we investigate a certain class of harmonic mappings related to the ... 
A Remark on multivalently convex and starlike functions
Nunokawa, Mamoru; Owa, Shigeyoshi; Polatoğlu, Yaşar; Yavuz Duman, Emel (200701)Applying the result for certain analytic functions due to M. Nunokawa [Proc. Japan Acad. 68A, 152–153 (1992; Zbl 0773.30020)], some properties for multivalently convex and starlike functions ar discussed. 
A study on the generalization of Janowski functions in the unit disc
Polatoğlu, Yaşar; Yavuz, Emel; Bolcal, Metin; Şen, A. (200601)Let › be the class of functions w(z), w(0) = 0, w(z) < 1 regular in the unit disc D = {z : z < 1}. For arbitrarily fixed numbers A 2 (¡1,1), B 2 (¡1,A), 0 • fi < 1 let P(A,B,fi) be the class of regular functions p(z) ... 
An investigation on a new class of harmonic mappings
Yavuz Duman, Emel; Polatoğlu, Yaşar; Kahramaner, Yasemin (Springer International Publishing Ag, Gewerbestrasse 11, Cham, Ch6330, Switzerland, 2013)In the present paper, we give an extension of the idea which was introduced by Sakaguchi (J. Math. Soc. Jpn. 11:7275, 1959), and we give some applications of this extended idea for the investigation of the class of harmonic ... 
Coefficient inequalities for classes of uniformly starlike and convex functions
Owa, Shigeyoshi; Polatoğlu, Yaşar; Yavuz, Emel (200601)In view of classes of uniformly starlike and convex functions in the open unit discUwhich was considered by S. Shams, S.R. Kulkarni and J.M. Jahangiri, some coefﬁcient inequalities for functions are discussed 
Distortion estimate and radius of starlikeness for generalized pvalent closetostar functions
Özkan, H. Esra; Yavuz Duman, Emel (HIKARI, 2013)Let A(p, n), n ≥ 1, p ≥ 1 be the class of all analytic functions in the open unit disc D = {z z < 1} of the form f(z) = zp + anp+1znp+1 + anp+2znp+2 + ··· . Let g(z) be an element of A(p, n) such that g(z) satisfies ... 
Distortion properties of perturbed mvalent Janowski Starlike logharmonic functions
Polatoğlu, Yaşar; Özkan, H. Esra; Yavuz Duman, Emel (International Conference on Theory and Applications of Mathematics and Informatics, ICTAMI, 2009) 
Growth and distortion theorems for multivalent Janowski closetoconvex harmonic functions with shear construction method
Polatoğlu, Yaşar; Yavuz Duman, Emel; Ozkan, Hatice Esra (Scientific Technical Research Council TurkeyTubitak, Ataturk Bulvarı No 221, Kavaklıdere, Tr06100 Ankara, Turkey, 2013)In this paper we introduce the class of mvalent Janowski close to convex harmonic functions. Growth and distortion theorems are obtained for this class. Our study is based on the harmonic shear methods for harmonic functions. 
Growth theorems for perturbated starlike logharmonic mappings of complex order
Polatoğlu, Yaşar; Yavuz Duman, Emel; Özkan, H. Esra (2009)Let H(D) be the linear space of all analytic functions defined on the open unit disc D = {z ∈ C : z < 1}. A sensepreserving logharmonic mapping is the solution of the nonlinear elliptic partial differential equation ... 
Harmonic Function For Which The Second Dilatation is AlphaSpiral
Duman Yavuz, Emel; Aydoğan, Melike; Polatoğlu, Yaşar; Kahramaner, Yasemin (Springer International Publishing Ag, Gewerbestrasse 11, Cham, Ch6330, Switzerland, 2012)Let f = h + (g) over bar be a harmonic function in the unit disc . We will give some properties of f under the condition the second dilatation is alphaspiral 
Harmonic mappings for which second dilatation is Janowski functions
Yavuz Duman, Emel; Polatoğlu, Yaşar; Kahramaner, Yasemin; Darus, Maslina (2013)In the present paper we extend the fundamental property that if h(z) and g(z) are regular functions in the open unit disc D with the properties h(0) = g(0) = 0, h maps D onto manysheeted region which is starlike with ... 
Harmonic univalent functions with Janowski starlike analytic part
Yavuz, Emel (International Short Joint Research Workshop, Study on NonAnalytic and Univalent Functions and Applications, 2008, Research Institute for Mathematical Sciences, Kyoto University (RIMS), Kyoto, Japan, 2008) 
lambdafractional closetoconvex functions
Polatoğlu, Yaşar; Yavuz, Emel (International Symposium on Geometric Function Theory and Applications, 2007, Istanbul Kültür University, Istanbul, Turkey, 2007) 
Lambdafractional properties of generalized Janowski functions in the unit disc
Çağlar, Mert; Polatoğlu, Yaşar; Yavuz, Emel (2008)For analytic function f(z) = z + a2z 2 + · · · in the open unit disc D, a new fractional operator Dλf(z) is defined. Applying this fractional operator Dλf(z) and the principle of subordination, we give new proofs for ... 
MarxStrohhacker inequality for MocanuJanowski alphaconvex functions
Polatoğlu, Yaşar; Yavuz, Emel (2007)Let be the class of functions w(z) regular in the unit disc D = {z : z < 1} with w(0) = 0, and w(z) < 1. For arbitrarily fixed real numbers A 2 ( 1,1) and B 2 ( 1,A), let P(A, B) be the class of regular functions p(z) ... 
Multivalued starlike functions of complex order
Polatoğlu, Yaşar; Yavuz, Emel; Çağlar, Mert; Owa, Shigeyoshi (2008)Let S ∗ λ (1−b)(b 6= 0, complex) denote the class of functions f(z) = z+a2z 2+· · · analytic in the open unit disc D = {z ∈ Cz < 1} which satisfy for z = reiθ ∈ D, f(z) z 6= 0 and Re · 1 + 1 b µ z (Dλ f ... 
Multivalued starlike functions of complex order
Polatoğlu, Yaşar; Çağlar, Mert; Owa, Shigeyoshi; Yavuz, Emel; Şen, Arzu (2008)Let Aα be the class of functions f(z) = z α (z + a2z 2 + · · ·) which are analytic in the open unit disc U. For f(z) ∈ Aα using the fractional calculus, a subclass S ∗ α (1−b) which is the class of starlike functions ... 
New characterization of the class of starlike functions
Yavuz, Emel; Polatoğlu, Yaşar; Owa, Shigeyoshi (The Korean Mathematical Society, 2008)For analytic functions f(z) in the open unit disc D, an operator Nα(f(z)) relating with starlike functions is introduced. The object of the present paper is to discuss some properties of the operator Nα(f(z)). 
New results of the generalization of Sakaguchi functions
Polatoğlu, Yaşar; Yavuz, Emel (2009) 
New subclasses of certain analytic functions
Owa, Shigeyoshi; Polatoğlu, Yaşar; Yavuz Duman, Emel; Aydoğan, S. M. (2010)For certain analytic functions fiz) in the open unit disk U, two subclasses 7ia,S;g) and Q(a,(5;g) associated with some analytic function g{z). Some interesting sufficient conditions for fiz) to be in ^(Q,^;^ ) and ...