On the improvement of Mocanu s conditions
|
|
- Mildred Mitchell
- 5 years ago
- Views:
Transcription
1 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 R E S E A R C H Open Access On the improvement of Mocanu s conditions M Nunokawa 1,SOwa,NECho 3*,JSokół 4 E Yavu Duman 5 * Correspondence: necho@pknu.ac.kr 3 Pukyong National University, Pusan, , Korea Full list of author information is available at the end of the article Abstract We estimate Argp() for functions of the form p()1+a 1 + a + a in the unit disc D : <1 under several assumptions. By using Nunokawa s lemma, we improve a few of Mocanu s results obtained by differential subordinations. Some applications for strongly starlikeness convexity are formulated. MSC: Primary 3C45; secondary 3C8 Keywords: Nunokawa s lemma; strongly starlike functions of order alpha; strongly convex functions of order alpha; subordination 1 Introduction Let H be the class of functions analytic in the unit disk D C : <1, denote by A the class of analytic functions in D usually normalied, i.e., A f H : f (), f () 1. Let SS (β) denote the class of strongly starlike functions of order β,<β 1, SS (β): f A : Arg f () < βπ,, D which was introduced in [1] []. We say that f A is in the class SC (β) ofstrongly convex functions of order β when f () SS (β). We say that f H is subordinate to g H in the unit disc D, writtenf g if only if there exists an analytic function w H such that w(), w() <1 g[w()] for D g(d). In particular, if g is univalent in D then the subordination principle says that f g if only if f () g() f ( < r) g( < r) for all r (, 1). Main result In this section, we investigate conditions, under which a function f A is strongly starlike or strongly convex. We also estimate Argp() for functions of the form p() 1+a 1 + a + a in the unit disc D, under several assumptions, then we use this estimation for the case p()f ()/. By using Nunokawa s lemma [3], we improve a few Mocanu s[4, 5] results obtained by differential subordinations. Some sufficient conditions for functions to be in several subclasses of strongly starlike functions can also be found in the recent papers [6][7 11]. Theorem.1 Let + n a n n be analytic in the unit disc D. If Arg f () απ < , D, (.1) 13 Nunokawa et al.; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( which permits unrestricted use, distribution, reproduction in any medium, provided the original work is properly cited.
2 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 Page of 1 where α 1/(1 + β) 1/( (log 4)/π) , β 1 (log 4)/π.5587, then f Arg () < π, D, (.) or f is starlike in D. Proof By (.1), we have f () 1/α 1+ 1, D. Let ρe iθ, ρ [, 1), θ ( π, π]. The function w()(1+)/(1 )isunivalentind maps < ρ < 1 onto the open disc D(C, R) withthecenterc (1+ρ )/(1 ρ )the radius R (ρ)/(1 ρ ). Then by the subordination principle under univalent function, f ( xe iθ) 1/α D(C, R) for all x [, ρ), θ ( π, π]. (.3) A simple geometric observation yields to Arg ( f ( ρe iθ)) 1/α sin 1 R C ρ sin 1 for all ρ [, 1), θ ( π, π]. (.4) 1+ρ Therefore, applying the same idea as [3, pp ] for re iθ, r [, 1), θ ( π, π], we have Arg r Arg f ( ρe iθ) dρ Arg f ( ρe iθ) dρ The function h(r)r sin 1 α α Arg ( f ( ρe iθ)) 1/α dρ sin 1 α ρ sin 1 α r sin 1 ρ 1+ρ dρ ρ 1+ρ log( 1+ρ ) r 1+r log( 1+r ) r 1+r log( 1+r ), r [, 1). ρr is increasing because h (r)sin 1 r/(1 + r ) >. Now, letting r 1,weobtain Arg α(π/ log ) απ 1 log 4 π π αβ, D. ρ
3 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 Page 3 of 1 Using this (.1), we obtain f Arg () Arg f () + Arg < απ + π αβ α(1 + β)π π, D. It completes the proof. Remark. Theorem.1is an improvementofmocanu sresultin [4]. Theorem.3 Let p()1+ n1 a n n be analytic in the unit disc D. If Re p()+p () >, D, (.5) then Arg p() < π log , D. (.6) Proof By (.5), we have p()+p () 1+, D. (.7) 1 Let ρe iθ, ρ [, 1), θ ( π, π]. The subordination principle used for (.7)gives p( xe iθ) + xe iθ p ( xe iθ) 1+ρ 1 ρ < ρ for all x [, ρ), θ ( π, π]. (.8) 1 ρ A simple geometric observation yields to ( Arg p ρe iθ ) + ρe iθ p ( ρe iθ) sin 1 ρ for all ρ [, 1), θ ( π, π]. (.9) 1+ρ
4 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 Page 4 of 1 Therefore, for re iθ, r [, 1), θ ( π, π], we have Arg p() p() Arg Arg (tp(t)) dt Arg (p(t)+tp (t)) dt Arg (p(ρeiθ )+ρe iθ p (ρe iθ ))e iθ dρ re iθ Arg ( ( p ρe iθ ) + ρe iθ p ( ρe iθ)) dρ Argr ( Arg p ρe iθ ) + ρe iθ p ( ρe iθ) dρ. Therefore, by using (.9), we have r Arg p() α sin 1 ρ 1+ρ dρ α ρ sin 1 ρ 1+ρ log( 1+ρ ) ρr ρ < α ρ sin 1 ρ 1+ρ log( 1+ρ ) ρ1 ρ π log , D. It leads to the desired conclusion. Remark.4 Theorem.3 is an improvement of Mocanu s result in [5], where instead of γ π log is θ 1 max θ : Arg e log( 1+e iθ) 1 iθ Substituting p()/, f A,inTheorem.3leadstothefollowingcorollary. Corollary.5 If f A itsatisfies Re f () >, D, then Arg < π log , D. Substituting p()f ()/, f A,inTheorem.3 gives the following corollary.
5 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 Page 5 of 1 Corollary.6 If f A itsatisfies f () Re ( + f ) () f () ( f ) () >, D, then f Arg () < π log , D. This means that f is strongly starlike of order 1 (log 4)/π Substituting p()1+f ()/f (), f A,inTheorem.3 gives the following corollary. Corollary.7 If f A itsatisfies Re 1+ f ( () + f ) ( () f ) () >, D, f () f () f () then Arg 1+ f () < π log , D. f () This means that f is strongly convex of order 1 (log 4)/π Theorem.8 Let + n a n n be analytic in the unit disc D, suppose that f () 1 <1, D. (.1) Then we have f Arg () <(1+r) sin 1 r + 1 r 1, (.11) where r <1,, therefore, we have f () Re > for < r, (.1) where.9 < r <.93is the positive root of the equation sin 1 r π ( 1 r 1). (.13) (1 + r) Proof From (.1), we have f () 1+, so the subordination principle gives Arg f () sin 1, D (.14)
6 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 Page 6 of 1 for re iθ, Arg 1 r Arg f ( ρe iθ) e dρ iθ re iθ Arg f ( ρe dρ iθ) < Then we have Arg f ( ρe iθ) dρ sin 1 ρ dρ. sin 1 ρ dρ r sin 1 r + 1 r 1. Therefore, from (.14), we have f Arg () Arg f () + Arg < sin 1 r + r sin 1 r + 1 r 1, r <1. The function G(r)(1+r) sin 1 r + 1 r 1 sin 1 r + sin 1 ρ dρ increases in [, 1] as the sum of two increasing functions. Moreover, G(), G(1) π 1, it satisfies G(.9) < π <G(.93) Therefore, the equation (.13)hasthesolutionr,.9<r <.93, f () Re > for < r.93. This completes the proof. Theorem.9 Let + n a n n be analytic in the unit disc D, suppose that f () 1 < α, D, (.15)
7 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 Page 7 of 1 with α (, / 5]. Then f is strongly starlike of order β, where β (, 1] is the positive root of the equation sin 1 α 1 α /4 + α 1 α πβ. (.16) Proof We have f () 1+α. Applying the result from [4,p.118]wehavealsothatf()/ 1+α/ in D. This shows that Arg f () sin 1 α, D, (.17) Arg 1 α sin, D. (.18) Therefore, using (.17) (.18), we have f Arg () Arg f () + Arg < sin 1 α + sin 1 α, D. For α (, / 5], we have α +(α/) 1, so we can use the formula sin 1 α + sin 1 α sin 1 α 1 α /4 + α 1 α. The function H(α)sin 1 α 1 α /4 + α 1 α sin 1 α + sin 1 α increases in the segment [, / 5] as the sum of two increasing functions. Moreover, H(), H(/ 5) π/, so the equation (.16) hasin(,1]thesolutionβ. Thiscompletes the proof. Putting α / 5, we get β 1 Theorem.15 becomes the result from [4,p.118]: [ f () 1 </ 5, D ] [ Re f ()/ >, D ]. Theorem.1 Let p()1+ n1 c n n be analytic in the unit disc D, suppose that ( p p()+α ) Arg () < tan 1 α δ(β) sin((1 + β)π/) p() 1+ α δ(β) cos((1 + β)π/) πβ, D, (.19)
8 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 Page 8 of 1 where α <,<β <1, δ(β) β (( ) 1 β β+1 ( ) 1 β β 1 ) + 1+β 1+β α > sin(πβ/). δ(β) Then Argp() < βπ in D. Proof Suppose that there exists a point D such that Arg p() < πβ for < (.) Arg p( ) πβ, then by Nunokawa s lemma [1], we have p( ) 1/β ±ia, a > p ( ) p( ) ikβ, where k 1 ( a + 1 ) a when Arg p( ) πβ k 1 ( a + 1 ) a when Arg p( ) πβ, moreover, βk δ(β). (.1) aβ For the case Argp( ) πβ,wehavefrom(.1), ( p ) ( ) Arg p( )+α p( ) Arg p( ) + Arg 1+α πβ + Arg 1+ α βk a β ( p ) ( ) p ( ) e iπ(1+β)/ ( α δ(β) sin π(1+β) tan 1 1+ α δ(β) cos π(1+β) ) πβ This contradicts (.19), for the case Argp( ) πβ, applying the same method as above, we have Arg p( )+α ( p ( ) p( ) ) ( α δ(β) sin π(1+β) ) tan 1 πβ 1+ α δ(β) cos π(1+β).. This contradicts also (.19),, therefore, it completes the proof.
9 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 Page 9 of 1 Theorem.11 Let p()1+ n1 c n n be analytic in the unit disc D, suppose that ( p p()+α ) Arg () < π p() β + π tan 1 where <α,<β <1, α δ(β) sin((1 β)π/) 1+ α δ(β) cos((1 β)π/) for D, (.) δ(β) β (( ) 1 β β+1 ( ) 1 β β 1 ) + 1+β 1+β α > sin(πβ/). δ(β) Then Argp() < πβ in D. Proof The proof runs as the previous proof, take α > into account. Suppose that there exists a point D such that Arg p() < πβ for < (.3) Arg p( ) πβ, then by Nunokawa s lemma [1], we have for the case Argp( ) πβ, ( p ) ( ) Arg p( )+α p( ) Arg p( ) + Arg 1+α πβ + Arg 1+ αβk πβ + tan 1 ( a β ( p ) ( ) p ( ) eiπ(1+β)/ α δ(β) sin π(1+β) 1+ α δ(β) cos π(1+β) ) πβ. This contradicts (.), for the case Argp( ) πβ,applyingthesamemethodas above, we have Arg p( )+α ( p ( ) p( ) ) ( πβ α δ(β) sin π(1+β) + tan 1 1+ α δ(β) cos π(1+β) ) πβ. This contradicts also (.),, therefore, it completes the proof. Competing interests The authors declare that they have no competing interests. Authors contributions All authors jointly worked on the results, they read approved the final manuscript.
10 Nunokawa et al. Journal of Inequalities Applications 13, 13:46 Page 1 of 1 Author details 1 University of Gunma, Hoshikuki-cho 798-8, Chuou-Ward, Chiba, 6-88, Japan. Kinki University, Higashi-Osaka, Osaka, , Japan. 3 Pukyong National University, Pusan, , Korea. 4 Department of Mathematics, Resów University of Technology, Al. Powstańców Warsawy 1, Resów, , Pol. 5 Department of Mathematics Computer Science, İstanbul Kültür University, İstanbul, Turkey. Acknowledgements This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science Technology (No ). Dedicated to Professor Hari M Srivastava. Received: 4 April 13 Accepted: 1 August 13 Published: 8 September 13 References 1. Stankiewic, J: Quelques problèmes extrèmaux dans les classes des fonctions α-angulairement ètoilèes. Ann. Univ. Mariae Curie-Skłodowska, Sect. A, (1966). Brannan, DA, Kirwan, WE: On some classes of bounded univalent functions. J. Lond. Math. Soc. 1(), (1969) 3. Nunokawa, M, Owa, S, Yavu Duman, E, Aydoğan, M: Some properties of analytic functions relating to the Miller Mocanu result. Comput. Math. Appl. 61, (11) 4. Mocanu, PT: Some starlikeness conditions for analytic functions. Rev. Roum. Math. Pures Appl. 33(1-), (1988) 5. Mocanu, PT: New extensions of the theorem of R. Singh S. Singh. Mathematica 37(6), (1995) 6. Aouf, MK, Diok, J, Sokół, J: On a subclass of strongly starlike functions. Appl. Math. Lett. 4, 7-3 (11) 7. Sokół, J: On sufficient condition to be in a certain subclass of starlike functions defined by subordination. Appl. Math. Comput. 19, (7) 8. Sokół, J: On functions with derivative satisfying a geometric condition. Appl. Math. Comput. 4, (8) 9. Sokół, J: Coefficient estimates in a class of strongly starlike functions. Kyungpook Math. J. 49, (9) 1. Srivastava, HM: Generalied hypergeometric functions associated families of k-starlike functions. Gen. Math. 15(-3), 1-6 (7) 11. Srivastava, HM, Lashin, AY: Subordination properties of certain classes of multivalently analytic functions. Math. Comput. Model. 5, (1) 1. Nunokawa, M: On the order of strongly starlikeness of strongly convex functions. Proc. Jpn. Acad., Ser. A, Math. Sci. 69(7), (1993) doi:1.1186/19-4x Cite this article as: Nunokawa et al.: On the improvement of Mocanu s conditions. Journal of Inequalities Applications 13 13:46.
On differential subordinations in the complex plane
Nunokawa et al. Journal of Inequalities Applications 015) 015:7 DOI 10.1186/s13660-014-0536-9 R E S E A R C H Open Access On differential subordinations in the complex plane Mamoru Nunokawa 1, Nak Eun
More informationSome applications of differential subordinations in the geometric function theory
Sokół Journal of Inequalities and Applications 2013, 2013:389 R E S E A R C H Open Access Some applications of differential subordinations in the geometric function theory Janus Sokół * Dedicated to Professor
More informationON SOME LENGTH PROBLEMS FOR ANALYTIC FUNCTIONS
Nunokawa, M. and Sokół, J. Osaka J. Math. 5 (4), 695 77 ON SOME LENGTH PROBLEMS FOR ANALYTIC FUNCTIONS MAMORU NUNOKAWA and JANUSZ SOKÓŁ (Received December 6, ) Let A be the class of functions Abstract
More informationarxiv: v2 [math.cv] 24 Nov 2009
On strongly starlike and convex functions of orderαand typeβ IKKEI HOTTA Division of Mathematics, Graduate School of Information Sciences, Tohoku University, 6-3-09 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi
More informationSufficient conditions for starlike functions associated with the lemniscate of Bernoulli
Kumar et al. Journal of Inequalities and Applications 2013, 2013:176 R E S E A R C H Open Access Sufficient conditions for starlike functions associated with the lemniscate of Bernoulli S Sivaprasad Kumar
More informationResearch Article Differential Subordinations of Arithmetic and Geometric Means of Some Functionals Related to a Sector
International Journal of Mathematics and Mathematical Sciences Volume 2011, Article ID 205845, 19 pages doi:10.1155/2011/205845 Research Article Differential Subordinations of Arithmetic and Geometric
More informationOn products of multivalent close-to-star functions
Arif et al. Journal of Inequalities and Alications 2015, 2015:5 R E S E A R C H Oen Access On roducts of multivalent close-to-star functions Muhammad Arif 1,JacekDiok 2*,MohsanRaa 3 and Janus Sokół 4 *
More informationInclusion relationships for certain classes of analytic functions involving the Choi-Saigo-Srivastava operator
Cho Yoon Journal of Inequalities Applications 2013, 2013:83 R E S E A R C H Open Access Inclusion relationships for certain classes of analytic functions involving the Choi-Saigo-Srivastava operator Nak
More informationThe Noor Integral and Strongly Starlike Functions
Journal of Mathematical Analysis and Applications 61, 441 447 (001) doi:10.1006/jmaa.001.7489, available online at http://www.idealibrary.com on The Noor Integral and Strongly Starlike Functions Jinlin
More informationON CERTAIN CLASS OF UNIVALENT FUNCTIONS WITH CONIC DOMAINS INVOLVING SOKÓ L - NUNOKAWA CLASS
U.P.B. Sci. Bull., Series A, Vol. 80, Iss. 1, 018 ISSN 13-707 ON CERTAIN CLASS OF UNIVALENT FUNCTIONS WITH CONIC DOMAINS INVOLVING SOKÓ L - NUNOKAWA CLASS S. Sivasubramanian 1, M. Govindaraj, K. Piejko
More informationNotes on Starlike log-harmonic Functions. of Order α
Int. Journal of Math. Analysis, Vol. 7, 203, no., 9-29 Notes on Starlike log-harmonic Functions of Order α Melike Aydoğan Department of Mathematics Işık University, Meşrutiyet Koyu Şile İstanbul, Turkey
More informationBanach Journal of Mathematical Analysis ISSN: (electronic)
Banach J. Math. Anal. (008), no., 16 Banach Journal of Mathematical Analysis ISSN: 1735-8787 (electronic) http://www.math-analysis.org GENEALIZATION OF SǍLǍGEAN OPEATO FO CETAIN ANALYTIC FUNCTIONS ALAWIAH
More informationj(z) > + FZ f(z) z + oz f(z) 1-.F < 1-.F zf (z) } 1 E (z 6 U,F 1). (1.3) >/(z e u) ANGULAR ESTIMATIONS OF CERTAIN INTEGRAL OPERATORS
Internat. J. Math. & Math. Sci. VOL. 1 NO. (1998) 369374 369 ANGULAR ESTIMATIONS OF CERTAIN INTEGRAL OPERATORS NAK EUN CHO, IN HWA KIM JI A KIM Department of Applied Mathematics Pukyong National University
More informationNOTE ON RADIUS PROBLEMS FOR CERTAIN CLASS OF ANALYTIC FUNCTIONS. We dedicate this paper to the 60th anniversary of Professor Y. Polatoglu.
NOTE ON RADIUS PROBLEMS FOR CERTAIN CLASS OF ANALYTIC FUNCTIONS Neslihan Uyanik 1, Shigeyoshi Owa 2 We dedicate this paper to the 60th anniversary of Professor Y. Polatoglu Abstract For analytic functions
More informationInt. J. Open Problems Complex Analysis, Vol. 3, No. 1, March 2011 ISSN ; Copyright c ICSRS Publication,
Int. J. Open Problems Complex Analysis, Vol. 3, No. 1, March 211 ISSN 274-2827; Copyright c ICSRS Publication, 211 www.i-csrs.org Coefficient Estimates for Certain Class of Analytic Functions N. M. Mustafa
More informationDifferential Subordinations and Harmonic Means
Bull. Malays. Math. Sci. Soc. (2015) 38:1243 1253 DOI 10.1007/s40840-014-0078-9 Differential Subordinations and Harmonic Means Stanisława Kanas Andreea-Elena Tudor eceived: 9 January 2014 / evised: 3 April
More informationsatisfies the condition Theorem 1.1. Let $p\geq 2$. A NOTE ON MULTIVALENT FUNCTIONS 1. INTRODUCTION 2. MAIN RESULTS Theorem 2.1.
1982 2016 63-68 63 A NOTE ON MULTIVALENT FUNCTIONS MAMORU NUNOKAWA, JANUSZ SOK\ OL ABSTRACT. The Noshiro-Warschawski Theorem [1], [5] provides a simple and useful $\mathfrak{r}\mathfrak{e}\{f (z)$ sufficient
More informationResearch Article Applications of Differential Subordination for Argument Estimates of Multivalent Analytic Functions
Abstract and Applied Analysis Volume 04, Article ID 63470, 4 pages http://dx.doi.org/0.55/04/63470 search Article Applications of Differential Subordination for Argument Estimates of Multivalent Analytic
More informationMalaya J. Mat. 4(1)(2016) 37-41
Malaya J. Mat. 4(1)(2016) 37-41 Certain coefficient inequalities for -valent functions Rahim Kargar a,, Ali Ebadian a and Janus Sokół b a Deartment of Mathematics, Payame Noor University, I. R. of Iran.
More informationSANDWICH-TYPE THEOREMS FOR A CLASS OF INTEGRAL OPERATORS ASSOCIATED WITH MEROMORPHIC FUNCTIONS
East Asian Mathematical Journal Vol. 28 (2012), No. 3, pp. 321 332 SANDWICH-TYPE THEOREMS FOR A CLASS OF INTEGRAL OPERATORS ASSOCIATED WITH MEROMORPHIC FUNCTIONS Nak Eun Cho Abstract. The purpose of the
More informationAn Integrodifferential Operator for Meromorphic Functions Associated with the Hurwitz-Lerch Zeta Function
Filomat 30:7 (2016), 2045 2057 DOI 10.2298/FIL1607045A Pulished y Faculty of Sciences Mathematics, University of Niš, Seria Availale at: http://www.pmf.ni.ac.rs/filomat An Integrodifferential Operator
More informationOn Multivalent Functions Associated with Fixed Second Coefficient and the Principle of Subordination
International Journal of Mathematical Analysis Vol. 9, 015, no. 18, 883-895 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/10.1988/ijma.015.538 On Multivalent Functions Associated with Fixed Second Coefficient
More informationdenote the subclass of the functions f H of the form H of the form
Scholars Journal of Engineering and Technology (SJET) Sch. J. Eng. Tech., 05; 3(4C):55-59 Scholars Academic and Scientific Publisher (An International Publisher for Academic and Scientific Resources) www.saspublisher.com
More informationORDER. 1. INTRODUCTION Let A denote the class of functions of the form
SARAJEVO JOURNAL OF MATHEMATICS Vol.10 (22) (2014), 55 60 DOI: 10.5644/SJM.10.1.07 ON UNIFIED CLASS OF γ-spirallike FUNCTIONS OF COMPLEX ORDER T. M. SEOUDY ABSTRACT. In this paper, we obtain a necessary
More informationSOME CRITERIA FOR STRONGLY STARLIKE MULTIVALENT FUNCTIONS
Bulletin of the Institute of Mathematics Academia Sinica (New Series) Vol. 7 (01), No. 3, pp. 43-436 SOME CRITERIA FOR STRONGLY STARLIKE MULTIVALENT FUNCTIONS DINGGONG YANG 1 AND NENG XU,b 1 Department
More informationOn a New Subclass of Meromorphically Multivalent Functions Defined by Linear Operator
International Mathematical Forum, Vol. 8, 213, no. 15, 713-726 HIKARI Ltd, www.m-hikari.com On a New Subclass of Meromorphically Multivalent Functions Defined by Linear Operator Ali Hussein Battor, Waggas
More informationA NEW CLASS OF MEROMORPHIC FUNCTIONS RELATED TO CHO-KWON-SRIVASTAVA OPERATOR. F. Ghanim and M. Darus. 1. Introduction
MATEMATIQKI VESNIK 66, 1 14, 9 18 March 14 originalni nauqni rad research paper A NEW CLASS OF MEROMORPHIC FUNCTIONS RELATED TO CHO-KWON-SRIVASTAVA OPERATOR F. Ghanim and M. Darus Abstract. In the present
More informationCERTAIN DIFFERENTIAL SUBORDINATIONS USING A GENERALIZED SĂLĂGEAN OPERATOR AND RUSCHEWEYH OPERATOR. Alina Alb Lupaş
CERTAIN DIFFERENTIAL SUBORDINATIONS USING A GENERALIZED SĂLĂGEAN OPERATOR AND RUSCHEWEYH OPERATOR Alina Alb Lupaş Dedicated to Prof. H.M. Srivastava for the 70th anniversary Abstract In the present paper
More informationCOEFFICIENTS OF BI-UNIVALENT FUNCTIONS INVOLVING PSEUDO-STARLIKENESS ASSOCIATED WITH CHEBYSHEV POLYNOMIALS
Khayyam J. Math. 5 (2019), no. 1, 140 149 DOI: 10.2204/kjm.2019.8121 COEFFICIENTS OF BI-UNIVALENT FUNCTIONS INVOLVING PSEUDO-STARLIKENESS ASSOCIATED WITH CHEBYSHEV POLYNOMIALS IBRAHIM T. AWOLERE 1, ABIODUN
More informationResearch Article A Study on Becker s Univalence Criteria
Abstract and Applied Analysis Volume 20, Article ID 75975, 3 pages doi:0.55/20/75975 Research Article A Study on Becker s Univalence Criteria Maslina Darus and Imran Faisal School of Mathematical Sciences,
More informationQuasiHadamardProductofCertainStarlikeandConvexFunctions
Global Journal of Science Frontier Research: F Mathematics and Decision Sciences Volume 15 Issue 10 Version 1.0 Year 2015 Type : Double Blind Peer Reviewed International Research Journal Publisher: Global
More informationSome basic properties of certain subclasses of meromorphically starlike functions
Wang et al. Journal of Inequalities Applications 2014, 2014:29 R E S E A R C H Open Access Some basic properties of certain subclasses of meromorphically starlike functions Zhi-Gang Wang 1*, HM Srivastava
More informationarxiv: v1 [math.cv] 19 Jul 2012
arxiv:1207.4529v1 [math.cv] 19 Jul 2012 On the Radius Constants for Classes of Analytic Functions 1 ROSIHAN M. ALI, 2 NAVEEN KUMAR JAIN AND 3 V. RAVICHANDRAN 1,3 School of Mathematical Sciences, Universiti
More informationCoecient bounds for certain subclasses of analytic functions of complex order
Hacettepe Journal of Mathematics and Statistics Volume 45 (4) (2016), 1015 1022 Coecient bounds for certain subclasses of analytic functions of complex order Serap Bulut Abstract In this paper, we introduce
More informationJournal of Inequalities in Pure and Applied Mathematics
Journal of Inequalities in Pure and Applied Mathematics INTEGRAL MEANS INEQUALITIES FOR FRACTIONAL DERIVATIVES OF SOME GENERAL SUBCLASSES OF ANALYTIC FUNCTIONS TADAYUKI SEKINE, KAZUYUKI TSURUMI, SHIGEYOSHI
More informationResearch Article Coefficient Conditions for Harmonic Close-to-Convex Functions
Abstract and Applied Analysis Volume 212, Article ID 413965, 12 pages doi:1.1155/212/413965 Research Article Coefficient Conditions for Harmonic Close-to-Convex Functions Toshio Hayami Department of Mathematics,
More informationSubordination and Superordination Results for Analytic Functions Associated With Convolution Structure
Int. J. Open Problems Complex Analysis, Vol. 2, No. 2, July 2010 ISSN 2074-2827; Copyright c ICSRS Publication, 2010 www.i-csrs.org Subordination and Superordination Results for Analytic Functions Associated
More informationCoefficient bounds for some subclasses of p-valently starlike functions
doi: 0.2478/v0062-02-0032-y ANNALES UNIVERSITATIS MARIAE CURIE-SKŁODOWSKA LUBLIN POLONIA VOL. LXVII, NO. 2, 203 SECTIO A 65 78 C. SELVARAJ, O. S. BABU G. MURUGUSUNDARAMOORTHY Coefficient bounds for some
More informationTwo Points-Distortion Theorems for Multivalued Starlike Functions
Int. Journal of Math. Analysis, Vol. 2, 2008, no. 17, 799-806 Two Points-Distortion Theorems for Multivalued Starlike Functions Yaşar Polato glu Department of Mathematics and Computer Science TC İstanbul
More informationThe Relationships Between p valent Functions and Univalent Functions
DOI:.55/auom-25-5 An. Şt. Univ. Ovidius Constanţa Vol. 23(),25, 65 72 The Relationships Between p valent Functions and Univalent Functions Murat ÇAĞLAR Abstract In this paper, we obtain some sufficient
More informationCertain properties of a new subclass of close-to-convex functions
Arab J Math (212) 1:39 317 DOI 1.17/s465-12-29-y RESEARCH ARTICLE Pranay Goswami Serap Bulut Teodor Bulboacă Certain properties of a new subclass of close-to-convex functions Received: 18 November 211
More informationResearch Article A New Class of Meromorphic Functions Associated with Spirallike Functions
Applied Mathematics Volume 202, Article ID 49497, 2 pages doi:0.55/202/49497 Research Article A New Class of Meromorphic Functions Associated with Spirallike Functions Lei Shi, Zhi-Gang Wang, and Jing-Ping
More informationDifferential subordination theorems for new classes of meromorphic multivalent Quasi-Convex functions and some applications
Int. J. Adv. Appl. Math. and Mech. 2(3) (2015) 126-133 (ISSN: 2347-2529) Journal homepage: www.ijaamm.com International Journal of Advances in Applied Mathematics and Mechanics Differential subordination
More informationGrowth and distortion theorem for the Janowski alpha-spirallike functions in the unit disc
Stud. Univ. Babeş-Bolyai Math. 57(01), No., 55 59 Growth and distortion theorem for the Janowski alpha-spirallike functions in the unit disc Yaşar Polato glu Abstract. Let A be the class of all analytic
More informationInclusion and argument properties for certain subclasses of multivalent functions defined by the Dziok-Srivastava operator
Advances in Theoretical Alied Mathematics. ISSN 0973-4554 Volume 11, Number 4 016,. 361 37 Research India Publications htt://www.riublication.com/atam.htm Inclusion argument roerties for certain subclasses
More informationResearch Article Integral Means Inequalities for Fractional Derivatives of a Unified Subclass of Prestarlike Functions with Negative Coefficients
Hindawi Publishing Corporation Journal of Inequalities and Applications Volume 27, Article ID 97135, 9 pages doi:1.1155/27/97135 Research Article Integral Means Inequalities for Fractional Derivatives
More informationResearch Article Some Starlikeness Criterions for Analytic Functions
Hindawi Publishing Corporation Journal of Inequalities and Applications Volume 2010, Article ID 175369, 11 pages doi:10.1155/2010/175369 Research Article Some Starlikeness Criterions for Analytic Functions
More information2 Simply connected domains
RESEARCH A note on the Königs domain of compact composition operators on the Bloch space Matthew M Jones Open Access Correspondence: m.m.jones@mdx. ac.uk Department of Mathematics, Middlesex University,
More informationSUBORDINATION RESULTS FOR CERTAIN SUBCLASSES OF UNIVALENT MEROMORPHIC FUNCTIONS
SUBORDINATION RESULTS FOR CERTAIN SUBCLASSES OF UNIVALENT MEROMORPHIC FUNCTIONS, P.G. Student, Department of Mathematics,Science College, Salahaddin University, Erbil, Region of Kurdistan, Abstract: In
More informationSecond Hankel Determinant Problem for a Certain Subclass of Univalent Functions
International Journal of Mathematical Analysis Vol. 9, 05, no. 0, 493-498 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/0.988/ijma.05.55 Second Hankel Determinant Problem for a Certain Subclass of Univalent
More informationResearch Article Subordination and Superordination on Schwarzian Derivatives
Hindawi Publishing Corporation Journal of Inequalities and Applications Volume 008, Article ID 7138, 18 pages doi:10.1155/008/7138 Research Article Subordination and Superordination on Schwarzian Derivatives
More informationResults regarding the argument of certain p-valent analytic functions defined by a generalized integral operator
El-Ashwah ournal of Inequalities and Applications 1, 1:35 http://www.journalofinequalitiesandapplications.co/content/1/1/35 RESEARCH Results regarding the arguent of certain p-valent analytic functions
More informationResearch Article A Third-Order Differential Equation and Starlikeness of a Double Integral Operator
Abstract and Applied Analysis Volume 2, Article ID 9235, pages doi:.55/2/9235 Research Article A Third-Order Differential Equation and Starlikeness of a Double Integral Operator Rosihan M. Ali, See Keong
More informationResearch Article A New Class of Meromorphically Analytic Functions with Applications to the Generalized Hypergeometric Functions
Abstract and Applied Analysis Volume 20, Article ID 59405, 0 pages doi:0.55/20/59405 Research Article A New Class of Meromorphically Analytic Functions with Applications to the Generalized Hypergeometric
More informationResearch Article Properties of Certain Subclass of Multivalent Functions with Negative Coefficients
International Journal of Mathematics and Mathematical Sciences Volume 2012, Article ID 362312, 21 pages doi:10.1155/2012/362312 Research Article Properties of Certain Subclass of Multivalent Functions
More informationSome properties for α-starlike functions with respect to k-symmetric points of complex order
doi: 1.17951/a.217.71.1.1 A N N A L E S U N I V E R S I T A T I S M A R I A E C U R I E - S K Ł O D O W S K A L U B L I N P O L O N I A VOL. LXXI, NO. 1, 217 SECTIO A 1 9 H. E. DARWISH, A. Y. LASHIN and
More informationOn Some α-convex Functions
Int. J. Open Problems Comput. Sci. Math., Vol. 1, No. 1, June 2008 On Some α-convex Functions Mugur Acu 1, Fatima Al-Oboudi 2, Maslina Darus 3, Shigeyoshi Owa 4 Yaşar Polato glu 5 and Emel Yavuz 5 1 Department
More informationConvolution properties for subclasses of meromorphic univalent functions of complex order. Teodor Bulboacă, Mohamed K. Aouf, Rabha M.
Faculty of Sciences Mathematics, University of Niš, Serbia Available at: http://www.pmf.ni.ac.rs/filomat Filomat 26:1 (2012), 153 163 DOI: 10.2298/FIL1201153B Convolution properties for subclasses of meromorphic
More informationin the geometric function theory) Author(s) Shigeyoshi; Darus, Maslina; Cho, Na Citation 数理解析研究所講究録 (2010), 1717: 95-99
On another proof of Ozaki's Titlefor univalence (Extensions of theorem the h in the geometric function theory) Author(s) Nunokawa Mamoru; Hayami Toshio; U Shigeyoshi; Darus Maslina; Cho Na Citation 数理解析研究所講究録
More informationHarmonic Mappings for which Second Dilatation is Janowski Functions
Mathematica Aeterna, Vol. 3, 2013, no. 8, 617-624 Harmonic Mappings for which Second Dilatation is Janowski Functions Emel Yavuz Duman İstanbul Kültür University Department of Mathematics and Computer
More informationOn a subclass of analytic functions involving harmonic means
DOI: 10.1515/auom-2015-0018 An. Şt. Univ. Ovidius Constanţa Vol. 231),2015, 267 275 On a subclass of analytic functions involving harmonic means Andreea-Elena Tudor Dorina Răducanu Abstract In the present
More informationResearch Article Subordination Results on Subclasses Concerning Sakaguchi Functions
Hindawi Publishing Corporation Journal of Inequalities and Applications Volume 2009, Article ID 574014, 7 pages doi:10.1155/2009/574014 Research Article Subordination Results on Subclasses Concerning Sakaguchi
More informationJournal of Inequalities in Pure and Applied Mathematics
Journal of Inequalities in Pure and Applied Mathematics APPLICATIONS OF DIFFERENTIAL SUBORDINATION TO CERTAIN SUBCLASSES OF MEROMORPHICALLY MULTIVALENT FUNCTIONS H.M. SRIVASTAVA AND J. PATEL Department
More informationSubclasses of bi-univalent functions related to shell-like curves connected with Fibonacci numbers
Acta Univ. Sapientiae, Mathematica, 10, 1018 70-84 DOI: 10.478/ausm-018-0006 Subclasses of bi-univalent functions related to shell-like curves connected with Fibonacci numbers H. Özlem Güney Dicle University,
More informationAn Investigation on Minimal Surfaces of Multivalent Harmonic Functions 1
General Mathematics Vol. 19, No. 1 (2011), 99 107 An Investigation on Minimal Surfaces of Multivalent Harmonic Functions 1 Hakan Mete Taştan, Yaşar Polato glu Abstract The projection on the base plane
More informationdu+ z f 2(u) , which generalized the result corresponding to the class of analytic functions given by Nash.
Korean J. Math. 24 (2016), No. 3, pp. 36 374 http://dx.doi.org/10.11568/kjm.2016.24.3.36 SHARP HEREDITARY CONVEX RADIUS OF CONVEX HARMONIC MAPPINGS UNDER AN INTEGRAL OPERATOR Xingdi Chen and Jingjing Mu
More informationSUBCLASSES OF P-VALENT STARLIKE FUNCTIONS DEFINED BY USING CERTAIN FRACTIONAL DERIVATIVE OPERATOR
Sutra: International Journal of Mathematical Science Education Technomathematics Research Foundation Vol. 4 No. 1, pp. 17-32, 2011 SUBCLASSES OF P-VALENT STARLIKE FUNCTIONS DEFINED BY USING CERTAIN FRACTIONAL
More informationQuasiHadamardProductofCertainStarlikeandConvexPValentFunctions
Global Journal of Science Frontier Research: F Mathematics and Decision Sciences Volume 8 Issue Version.0 Year 208 Tye: Double Blind Peer Reviewed International Research Journal Publisher: Global Journals
More informationHarmonic Mappings Related to the Bounded Boundary Rotation
International Journal of Mathematical Analysis Vol. 8, 214, no. 57, 2837-2843 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/1.12988/ijma.214.4136 Harmonic Mappings Related to the Bounded Boundary Rotation
More informationCoefficient Bounds for a Certain Class of Analytic and Bi-Univalent Functions
Filomat 9:8 (015), 1839 1845 DOI 10.98/FIL1508839S Published by Faculty of Sciences Mathematics, University of Niš, Serbia Available at: http://www.pmf.ni.ac.rs/filomat Coefficient Bounds for a Certain
More informationGENERALIZATIONS OF STRONGLY STARLIKE FUNCTIONS. Jacek Dziok 1. INTRODUCTION. a n z n (z U). dm (t) k. dm (t) =2,
TAIWANESE JOURNAL OF MATHEMATICS Vol. 18, No. 1, pp. 39-51, February 14 DOI: 1.1165/tjm.18.14.986 This paper is available online at http://journal.taiwanmathsoc.org.tw GENERALIZATIONS OF STRONGLY STARLIKE
More informationHARMONIC CLOSE-TO-CONVEX MAPPINGS
Applied Mathematics Stochastic Analysis, 15:1 (2002, 23-28. HARMONIC CLOSE-TO-CONVEX MAPPINGS JAY M. JAHANGIRI 1 Kent State University Department of Mathematics Burton, OH 44021-9500 USA E-mail: jay@geauga.kent.edu
More informationA subclass of analytic functions
Stud. Univ. Babeş-Bolyai Math. 57(2012), No. 2, 277 282 A subclass of analytic functions Andreea-Elena Tudor Abstract. In the present paper, by means of Carlson-Shaffer operator and a multiplier transformation,
More informationMeromorphic parabolic starlike functions with a fixed point involving Srivastava-Attiya operator
Malaya J. Mat. 2(2)(2014) 91 102 Meromorphic parabolic starlike functions with a fixed point involving Srivastava-Attiya operator G. Murugusundaramoorthy a, and T. Janani b a,b School of Advanced Sciences,
More informationSufficient conditions for certain subclasses of meromorphic p-valent functions
Bol. Soc. Paran. Mat. (3s.) v. 33 (015): 9 16. c SPM ISSN-175-1188 on line ISSN-0037871 in ress SPM: www.sm.uem.br/bsm doi:10.569/bsm.v33i.1919 Sufficient conditions for certain subclasses of meromorhic
More informationResearch Article Some Subordination Results on q-analogue of Ruscheweyh Differential Operator
Abstract and Applied Analysis Volume 24, Article ID 958563, 6 pages http://dx.doi.org/.55/24/958563 Research Article Some Subordination Results on -Analogue of Ruscheweyh Differential Operator Huda Aldweby
More informationResearch Article Certain Subclasses of Multivalent Functions Defined by Higher-Order Derivative
Hindawi Function Spaces Volume 217 Article ID 5739196 6 pages https://doi.org/1.1155/217/5739196 Research Article Certain Subclasses of Multivalent Functions Defined by Higher-Order Derivative Xiaofei
More informationNEW SUBCLASS OF MULTIVALENT HYPERGEOMETRIC MEROMORPHIC FUNCTIONS
Kragujevac Journal of Mathematics Volume 42(1) (2018), Pages 83 95. NEW SUBCLASS OF MULTIVALENT HYPERGEOMETRIC MEROMORPHIC FUNCTIONS M. ALBEHBAH 1 AND M. DARUS 2 Abstract. In this aer, we introduce a new
More informationOn Starlike and Convex Functions with Respect to 2k-Symmetric Conjugate Points
Tamsui Oxford Journal of Mathematical Sciences 24(3) (28) 277-287 Aletheia University On Starlike and Convex Functions with espect to 2k-Symmetric Conjugate Points Zhi-Gang Wang and Chun-Yi Gao College
More informationSUBCLASS OF HARMONIC STARLIKE FUNCTIONS ASSOCIATED WITH SALAGEAN DERIVATIVE
LE MATEMATICHE Vol. LXIX (2014) Fasc. II, pp. 147 158 doi: 10.4418/2014.69.2.13 SUBCLASS OF HARMONIC STARLIKE FUNCTIONS ASSOCIATED WITH SALAGEAN DERIVATIVE H. E. DARWISH - A. Y. LASHIN - S. M. SOILEH The
More informationarxiv: v3 [math.cv] 11 Aug 2014
File: SahSha-arXiv_Aug2014.tex, printed: 27-7-2018, 3.19 ON MAXIMAL AREA INTEGRAL PROBLEM FOR ANALYTIC FUNCTIONS IN THE STARLIKE FAMILY S. K. SAHOO AND N. L. SHARMA arxiv:1405.0469v3 [math.cv] 11 Aug 2014
More informationRosihan M. Ali and V. Ravichandran 1. INTRODUCTION
TAIWANESE JOURNAL OF MATHEMATICS Vol. 14, No. 4, pp. 1479-1490, August 2010 This paper is available online at http://www.tjm.nsysu.edu.tw/ CLASSES OF MEROMORPHIC α-convex FUNCTIONS Rosihan M. Ali and V.
More informationSOME PROPERTIES OF A SUBCLASS OF ANALYTIC FUNCTIONS DEFINED BY A GENERALIZED SRIVASTAVA-ATTIYA OPERATOR. Nagat. M. Mustafa and Maslina Darus
FACTA UNIVERSITATIS NIŠ) Ser. Math. Inform. Vol. 27 No 3 2012), 309 320 SOME PROPERTIES OF A SUBCLASS OF ANALYTIC FUNCTIONS DEFINED BY A GENERALIZED SRIVASTAVA-ATTIYA OPERATOR Nagat. M. Mustafa and Maslina
More informationON CERTAIN SUBCLASSES OF UNIVALENT FUNCTIONS AND RADIUS PROPERTIES
ON CERTAIN SUBCLASSES OF UNIVALENT FUNCTIONS AND RADIUS PROPERTIES M. OBRADOVIĆ and S. PONNUSAMY Let S denote the class of normalied univalent functions f in the unit disk. One of the problems addressed
More informationFekete-Szegö Inequality for Certain Classes of Analytic Functions Associated with Srivastava-Attiya Integral Operator
Applied Mathematical Sciences, Vol. 9, 015, no. 68, 3357-3369 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/10.1988/ams.015.543 Fekete-Szegö Inequality for Certain Classes of Analytic Functions Associated
More informationResearch Article On an Integral Transform of a Class of Analytic Functions
Abstract and Applied Analysis Volume 22, Article ID 25954, pages doi:.55/22/25954 Research Article On an Integral Transform of a Class of Analytic Functions Sarika Verma, Sushma Gupta, and Sukhjit Singh
More informationMajorization Properties for Subclass of Analytic p-valent Functions Defined by the Generalized Hypergeometric Function
Tamsui Oxford Journal of Information and Mathematical Sciences 284) 2012) 395-405 Aletheia University Majorization Properties for Subclass of Analytic p-valent Functions Defined by the Generalized Hypergeometric
More informationSOME RESULTS ASSOCIATED WITH FRACTIONAL CALCULUS OPERATORS INVOLVING APPELL HYPERGEOMETRIC FUNCTION
Volume 29), Issue, Article 4, 7 pp. SOME RESULTS ASSOCIATED WITH FRACTIONAL CALCULUS OPERATORS INVOLVING APPELL HYPERGEOMETRIC FUNCTION R. K. RAINA / GANPATI VIHAR, OPPOSITE SECTOR 5 UDAIPUR 332, RAJASTHAN,
More informationOn the Class of Functions Starlike with Respect to a Boundary Point
Journal of Mathematical Analysis and Applications 261, 649 664 (2001) doi:10.1006/jmaa.2001.7564, available online at http://www.idealibrary.com on On the Class of Functions Starlike with Respect to a
More informationConvolutions of Certain Analytic Functions
Proceedings of the ICM2010 Satellite Conference International Workshop on Harmonic and Quasiconformal Mappings (HQM2010) Editors: D. Minda, S. Ponnusamy, and N. Shanmugalingam J. Analysis Volume 18 (2010),
More informationOn subclasses of n-p-valent prestarlike functions of order beta and type gamma Author(s): [ 1 ] [ 1 ] [ 1 ] Address Abstract KeyWords
On subclasses of n-p-valent prestarlike functions of order beta and type gamma Elrifai, EA (Elrifai, E. A.) [ 1 ] ; Darwish, HE (Darwish, H. E.) [ 1 ] ; Ahmed, AR (Ahmed, A. R.) [ 1 ] E-mail Address: Rifai@mans.edu.eg;
More informationFaber polynomial coefficient bounds for a subclass of bi-univalent functions
Stud. Univ. Babeş-Bolyai Math. 6(06), No., 37 Faber polynomial coefficient bounds for a subclass of bi-univalent functions Şahsene Altınkaya Sibel Yalçın Abstract. In this ork, considering a general subclass
More informationStrong convergence theorems for asymptotically nonexpansive nonself-mappings with applications
Guo et al. Fixed Point Theory and Applications (2015) 2015:212 DOI 10.1186/s13663-015-0463-6 R E S E A R C H Open Access Strong convergence theorems for asymptotically nonexpansive nonself-mappings with
More informationBIII/. Malaysinn Math. Sc. Soc. (Second Series) 26 (2003) Coefficients of the Inverse of Strongly Starlike Functions. ROSlHAN M.
BULLETIN of the MALAYSIAN MATHEMATICAL SCIENCES SOCIETY BIII/. Malaysinn Math. Sc. Soc. (Second Series) 26 (2003) 63-71 Coefficients of the Inverse of Strongly Starlike Functions ROSlHAN M. ALI School
More informationA Certain Subclass of Multivalent Functions Involving Higher-Order Derivatives
Filomat 30:1 (2016), 113 124 DOI 10.2298/FIL1601113S Published by Faculty of Sciences Mathematics, University of Niš, Serbia Available at: http://www.pmf.ni.ac.rs/filomat A Certain Subclass of Multivalent
More informationOld and new order of linear invariant family of harmonic mappings and the bound for Jacobian
doi: 10.478/v1006-011-004-3 A N N A L E S U N I V E R S I T A T I S M A R I A E C U R I E - S K Ł O D O W S K A L U B L I N P O L O N I A VOL. LXV, NO., 011 SECTIO A 191 0 MAGDALENA SOBCZAK-KNEĆ, VIKTOR
More informationSOME APPLICATIONS OF SALAGEAN INTEGRAL OPERATOR. Let A denote the class of functions of the form: f(z) = z + a k z k (1.1)
STUDIA UNIV. BABEŞ BOLYAI, MATHEMATICA, Volume LV, Number 1, March 2010 SOME APPLICATIONS OF SALAGEAN INTEGRAL OPERATOR Abstract. In this paper we introduce and study some new subclasses of starlike, convex,
More informationHankel determinant for p-valently starlike and convex functions of order α
General Mathematics Vol. 17, No. 4 009, 9 44 Hankel determinant for p-valently starlike and convex functions of order α Toshio Hayami, Shigeyoshi Owa Abstract For p-valently starlike and convex functions
More informationSOME SUBCLASSES OF ANALYTIC FUNCTIONS DEFINED BY GENERALIZED DIFFERENTIAL OPERATOR. Maslina Darus and Imran Faisal
Acta Universitatis Apulensis ISSN: 1582-5329 No. 29/212 pp. 197-215 SOME SUBCLASSES OF ANALYTIC FUNCTIONS DEFINED BY GENERALIZED DIFFERENTIAL OPERATOR Maslina Darus and Imran Faisal Abstract. Let A denote
More informationAn Application of Wilf's Subordinating Factor Sequence on Certain Subclasses of Analytic Functions
International Journal of Applied Engineering Research ISS 0973-4562 Volume 3 umber 6 (208 pp. 2494-2500 An Application of Wilf's Subordinating Factor Sequence on Certain Subclasses of Analytic Functions
More information