Prof. Halit ORHAN

JOURNAL OF APPLIED ANALYSIS AND COMPUTATION , vol.5, pp.465-478, 2015 (SCI-Expanded)

Differential Subordinations Involving Generalized Bessel Functions

Baricz A., DENİZ E., ÇAĞLAR M., ORHAN H.

BULLETIN OF THE MALAYSIAN MATHEMATICAL SCIENCES SOCIETY , vol.38, no.3, pp.1255-1280, 2015 (SCI-Expanded)

Sufficient Conditions For Univalence and Quasiconformal Extensions

Indian Journal Of Pure & Applied Mathematics , vol.46, pp.41-50, 2015 (SCI-Expanded)

Initial Coefficient Bounds for a General Class of Bi-Univalent Functions

ORHAN H., Magesh N., Balaji V. K.

FILOMAT , vol.29, no.6, pp.1259-1267, 2015 (SCI-Expanded)

(alpha, beta, lambda, delta, m, Omega)(p)-Neighborhood for some families of analytic and multivalent functions

Orhan H.

ANALELE STIINTIFICE ALE UNIVERSITATII OVIDIUS CONSTANTA-SERIA MATEMATICA , vol.23, no.1, pp.225-236, 2015 (SCI-Expanded)

PARTIAL SUMS OF GENERALIZED BESSEL FUNCTIONS

ORHAN H., Yagmur N.

JOURNAL OF MATHEMATICAL INEQUALITIES , vol.8, no.4, pp.863-877, 2014 (SCI-Expanded)

Hardy space of generalized Struve functions

Yagmur N., ORHAN H.

COMPLEX VARIABLES AND ELLIPTIC EQUATIONS , vol.59, no.7, pp.929-936, 2014 (SCI-Expanded)

On the univalence of integral operations involving meromorphic functions

MATHEMATICAL COMMUNICATIONS , vol.18, no.1, pp.1-9, 2013 (SCI-Expanded)

Starlikeness and Convexity of Generalized Struve Functions

Yagmur N., ORHAN H.

ABSTRACT AND APPLIED ANALYSIS , 2013 (SCI-Expanded)

SOME GENERALIZATIONS ON THE UNIVALENCE OF AN INTEGRAL OPERATOR AND QUASICONFORMAL EXTENSIONS

Caglar M., ORHAN H.

MISKOLC MATHEMATICAL NOTES , vol.14, no.1, pp.49-62, 2013 (SCI-Expanded)

Coefficient Estimates and Other Properties for a Class of Spirallike Functions Associated with a Differential Operator

ORHAN H., Raducanu D., ÇAĞLAR M., BAYRAM M.

ABSTRACT AND APPLIED ANALYSIS , 2013 (SCI-Expanded)

Univalence criteria for meromorphic functions and quasiconformal extensions

Caglar M., ORHAN H.

JOURNAL OF INEQUALITIES AND APPLICATIONS , 2013 (SCI-Expanded)

Coefficient bounds for new subclasses of bi-univalent functions

Caglar M., ORHAN H., Yagmur N.

FILOMAT , vol.27, no.7, pp.1165-1171, 2013 (SCI-Expanded)

Majorization for certain subclasses of analytic functions involving the generalized Noor integral operator

Caglar M., ORHAN H., DENİZ E.

FILOMAT , vol.27, no.1, pp.143-148, 2013 (SCI-Expanded)

THE FEKETE-SZEGO PROBLEM FOR A CLASS OF ANALYTIC FUNCTIONS DEFINED BY DZIOK-SRIVASTAVA OPERATOR

Deniz E., ÇAĞLAR M., ORHAN H.

KODAI MATHEMATICAL JOURNAL , vol.35, no.3, pp.439-462, 2012 (SCI-Expanded)

On the univalence of an integral operator defined by Hadamard product

DENİZ E., Raducanu D., ORHAN H.

APPLIED MATHEMATICS LETTERS , vol.25, no.2, pp.179-184, 2012 (SCI-Expanded)

SOME CONVEXITY PROPERTIES FOR TWO NEW P-VALENT INTEGRAL OPERATORS

Deniz E., Caglar M., ORHAN H.

HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS , vol.40, no.6, pp.829-837, 2011 (SCI-Expanded)

Univalence criterion for meromorphic functions and Loewner chains

APPLIED MATHEMATICS AND COMPUTATION , vol.218, no.3, pp.751-755, 2011 (SCI-Expanded)

Certain Subclasses of Multivalent Functions Defined by New Multiplier Transformations

DENİZ E., ORHAN H., Srivastava H. M.

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING , vol.36, no.6, pp.1091-1112, 2011 (SCI-Expanded)

Coefficient bounds for a subclass of starlike functions of complex order

Caglar M., Deniz E., ORHAN H.

APPLIED MATHEMATICS AND COMPUTATION , vol.218, no.3, pp.693-698, 2011 (SCI-Expanded)

SOME SUFFICIENT CONDITIONS FOR UNIVALENCE OF CERTAIN FAMILIES OF INTEGRAL OPERATORS INVOLVING GENERALIZED BESSEL FUNCTIONS

TAIWANESE JOURNAL OF MATHEMATICS , vol.15, no.2, pp.883-917, 2011 (SCI-Expanded)

Subclasses of meromorphically multivalent functions defined by a differential operator

ORHAN H., Raducanu D., DENİZ E.

COMPUTERS & MATHEMATICS WITH APPLICATIONS , vol.61, no.4, pp.966-979, 2011 (SCI-Expanded)

SOME NOTES ON EXTENSIONS OF BASIC UNIVALENCE CRITERIA

Deniz E., ORHAN H.

JOURNAL OF THE KOREAN MATHEMATICAL SOCIETY , vol.48, no.1, pp.179-189, 2011 (SCI-Expanded)

SOME PROPERTIES OF CERTAIN SUBCLASSES OF ANALYTIC FUNCTIONS WITH NEGATIVE COEFFICIENTS BY USING GENERALIZED RUSCHEWEYH DERIVATIVE OPERATOR

Deniz E., ORHAN H.

CZECHOSLOVAK MATHEMATICAL JOURNAL , vol.60, no.3, pp.699-713, 2010 (SCI-Expanded)

Some general univalence criteria for a family of integral operators

Srivastava H. M., Deniz E., ORHAN H.

APPLIED MATHEMATICS AND COMPUTATION , vol.215, no.10, pp.3696-3701, 2010 (SCI-Expanded)

ON SOME SUFFICIENT CONDITIONS FOR UNIVALENCE

Raducanu D., ORHAN H., Deniz E.

ANALELE STIINTIFICE ALE UNIVERSITATII OVIDIUS CONSTANTA-SERIA MATEMATICA , vol.18, no.2, pp.217-222, 2010 (SCI-Expanded)

The Fekete-Szegö problem for a generalized subclass of analytic functions

Kyungpook Mathematical Journal , vol.50, no.1, pp.37-47, 2010 (SCI-Expanded)

The Fekete-Szego problem for subclasses of analytic functions defined by a differential operator related to conic domains

ORHAN H., Deniza E., Raducanu D.

COMPUTERS & MATHEMATICS WITH APPLICATIONS , vol.59, no.1, pp.283-295, 2010 (SCI-Expanded)

Neighborhoods of a certain class of valent functions with negative coefficients defined by using a differential operator

Srivastava H. M., Orhan H.

Mathematical Inequalities and Applications , vol.12, no.2, pp.335-349, 2009 (SCI-Expanded)

Coefficient inequalities and inclusion relations for some families of analytic and multivalent functions

APPLIED MATHEMATICS LETTERS , vol.20, no.6, pp.686-691, 2007 (SCI-Expanded)

A generalization on subfamily of p-valent functions with negative coefficients

ORHAN H., Kiziltunç H.

Applied Mathematics and Computation , vol.155, no.2, pp.521-530, 2004 (SCI-Expanded)

ON A SUBCLASS OF CERTAIN STARLIKE FUNCTIONS WITH NEGATIVE COEFFICIENTS

KAMALİ M., ORHAN H.

Bulletin Of The Korean Mathematical Society , vol.41, pp.53-71, 2004 (SCI-Expanded)

On the Fekete-Szego problem

Orhan H., Kamali M.

APPLIED MATHEMATICS AND COMPUTATION , vol.144, no.1, pp.181-186, 2003 (SCI-Expanded)

On a subclass of analytic functions with negative coefficients

Orhan H.

APPLIED MATHEMATICS AND COMPUTATION , vol.142, pp.243-253, 2003 (SCI-Expanded)

A new class of analytic functions with negative coefficients

Vanitha L., Ramachandran C., Murugusundaramoorthy G., ORHAN H.

APPLIED MATHEMATICS AND COMPUTATION , vol.138, pp.531-543, 2003 (SCI-Expanded)

Starlike, convex and close-to convex functions of complex order

ORHAN H., KAMALİ M.

Applied Mathematics and Computation , vol.135, pp.251-262, 2003 (SCI-Expanded)

Fractional calculus and some properties of certain starlike functions with negative coefficients

Orhan H., Kamali M.

APPLIED MATHEMATICS AND COMPUTATION , vol.136, pp.269-279, 2002 (SCI-Expanded)

Articles Published in Other Journals

Coefficient estimates for power Bi–univalent Ma-Minda starlike and derivative functions

ORHAN H., Masih V. S., Ebadian A.

Journal of Analysis , 2025 (ESCI)

Upper bounds for Fekete–Szegö functional

SAĞSÖZ F., Arikan H., ORHAN H.

Boletin de la Sociedad Matematica Mexicana , vol.29, no.3, 2023 (ESCI)

SECOND HANKEL DETERMINANT FOR A CERTAIN SUBCLASS OF ANALYTIC FUNCTIONS DEFINED BY HYPERGEOMETRIC FUNCTIONS

ORHAN H., ÇAĞLAR M., ARIKAN H.

Afrika Matematika , vol.34, no.18, 2023 (ESCI)

SECOND HANKEL DETERMINANT FOR CERTAIN SUBCLASSES OF BI-STARLIKE FUNCTIONS DEFINED BY DIFFERENTIAL OPERATORS

Orhan H., Arıkan H., Çağlar M.

SAHAND COMMUNICATIONS IN MATHEMATICAL ANALYSIS , vol.20, no.2, pp.65-83, 2023 (ESCI)

FEKETE-SZEGO PROBLEM FOR SOME SUBCLASSES OF HOLOMORPHIC FUNCTIONS DEFINED BY THE COMBINATION OF OPOOLA AND BABALOLA DIFFERENTIAL OPERATORS

Shaba T. G., ÇAĞLAR M., ORHAN H.

Analele Universităţii din Oradea - Fascicola Matematică , vol.29, no.2, pp.5-16, 2022 (Peer-Reviewed Journal)

Coefficient inequalities for new subclasses of bi-univalent functions defined by using the function δ

Sağsöz F., Orhan H.

Asian-European Journal of Mathematics , vol.15, no.9, 2022 (ESCI)

COEFFICIENT INEQUALITIES FOR SUBCLASSES OF ANALYTIC FUNCTIONS BASED ON QUASI-SUBORDINATION AND MAJORIZATION RELATED WITH SIGMOID FUNCTIONS

Mathematica , vol.64, no.1, pp.130-148, 2022 (Scopus)

(P, Q)-Lucas polynomial coefficient relations of bi-univalent functions defined by the combination of Opoola and Babalola differential operators

Orhan H., Shaba T. G., Caglar M.

AFRIKA MATEMATIKA , vol.33, no.1, 2022 (ESCI)

Fekete-Szego Problem for a Subclass of Analytic Functions Associated with Chebyshev Polynomials

Caglar M., Orhan H., Kamali M.

BOLETIM SOCIEDADE PARANAENSE DE MATEMATICA , vol.40, 2022 (ESCI)

THE FEKETE-SZEGO PROBLEMS FOR SUBCLASS OF BI-UNIVALENT FUNCTIONS ASSOCIATED WITH SIGMOID FUNCTION

Orhan H., Murugusundaramoorthy G., Caglar M.

FACTA UNIVERSITATIS-SERIES MATHEMATICS AND INFORMATICS , vol.37, no.3, pp.495-506, 2022 (ESCI)

THE FEKETE-SZEGÖ PROBLEM FOR A GENERALIZED CLASS OF ANALYTIC FUNCTIONS OF COMPLEX ORDER ASSOCIATED WITH q−CALCULUS

ORHAN H., Porwal S., Magesh N.

Palestine Journal of Mathematics , vol.11, no.3, pp.39-47, 2022 (Scopus)

A COMPREHENSIVE CLASS OF BI-UNIVALENT FUNCTIONS SUBORDINATE TO SHELL-LIKE CURVES

ORHAN H., Magesh N., SIVAPALAN J., Murthy S.

Bulletin of the Transilvania University of Bra¸sov Series III: Mathematics and Computer Science , vol.63, no.2, 2021 (Peer-Reviewed Journal)

Coefficient inequalities for new subclasses of bi-univalent functions defined by using the function f_{δ}

ALTUNTAŞ F., ORHAN H.

Asian-European Journal of Mathematics , 2021 (ESCI)

Certain classes of bi-univalent functions associated with the Horadam polynomials

ORHAN H., Mamatha P. K., Swamy S. R., Magesh N., Yamini J.

ACTA UNIVERSITATIS SAPIENTIAE-MATHEMATICA , vol.13, no.1, pp.258-272, 2021 (ESCI)

Some applications of generalized Alexander integral operator

Southeast Asian Bulletin of Mathematics , 2021 (ESCI)

Fekete-Szego problem for certain subclasses of analytic functions defined by the combination of differential operators

BOLETIN DE LA SOCIEDAD MATEMATICA MEXICANA , vol.27, no.2, 2021 (ESCI)

(P, Q)-Lucas polynomial coefficient inequalities of bi-univalent functions defined by the combination of both operators of Al-Aboudi and Ruscheweyh

ORHAN H., Arikan H.

AFRIKA MATEMATIKA , vol.32, no.3-4, pp.589-598, 2021 (ESCI)

The Fekete-Szego functional for generalized starlike and convex functions of complex order

ORHAN H., Raducanu D.

ASIAN-EUROPEAN JOURNAL OF MATHEMATICS , vol.14, no.3, 2021 (ESCI)

FEKETE-SZEGO PROBLEM FOR A CLASS OF ANALYTIC FUNCTIONS CONNECTED WITH q-ANALOGUE OF INTEGRAL OPERATOR

EL-DEEB S. M., ORHAN H.

Analele Universităţii din Oradea - Fascicola Matematică , vol.28, no.1, pp.15-25, 2021 (Peer-Reviewed Journal)

THE FEKETE-SZEGO PROBLEM FOR A GENERALIZED CLASS OF ANALYTIC FUNCTIONS OF COMPLEX ORDER ASSOCIATED WITH q-CALCULUS

ORHAN H., SAURABH P., Magesh N.

Palestine Journal of Mathematics , 2021 (Scopus)

FEKETE-SZEGO PROBLEM FOR SUBCLASSES OF ANALYTIC FUNCTIONS ASSOCIATED WITH QUASI-SUBORDINATION

ARIKAN H., ÇAĞLAR M., ORHAN H.

Bulletin of the Transilvania University of Braşov – Series III Mathematics, Informatics, Physics , vol.12, no.2, pp.221-232, 2019 (Scopus)

Radii problems for normalized q-Bessel and Wright functions

Toklu E., Aktas I., ORHAN H.

ACTA UNIVERSITATIS SAPIENTIAE-MATHEMATICA , vol.11, no.1, pp.203-223, 2019 (ESCI)

Second Hankel determinant for certain class of bi-univalent functions defined by Chebyshev polynomials

ORHAN H., MAGESH N., Balaji V. K.

ASIAN-EUROPEAN JOURNAL OF MATHEMATICS , vol.12, no.2, 2019 (ESCI)

(theta, mu, tau)-NEIGHBORHOOD FOR ANALYTIC FUNCTIONS INVOLVING MODIFIED SIGMOID FUNCTION

ORHAN H., Caglar M.

COMMUNICATIONS FACULTY OF SCIENCES UNIVERSITY OF ANKARA-SERIES A1 MATHEMATICS AND STATISTICS , vol.68, no.2, pp.2161-2169, 2019 (ESCI)

On the Fekete-Szego Problem for a Certain Class of Meromorphic Functions Using q-Derivative Operator

Aouf M. K., ORHAN H.

KYUNGPOOK MATHEMATICAL JOURNAL , vol.58, no.2, pp.307-318, 2018 (ESCI)

ZALCMAN CONJECTURE FOR SOME SUBCLASSES OF ANALYTIC FUNCTIONS DEFINED BY SALAGEAN OPERATOR

ORHAN H., TOKLU E.

Journal of Advanced Mathematics and Mathematics Education , vol.1, no.1, pp.1-4, 2018 (Peer-Reviewed Journal)

ON PARTIAL SUMS OF NORMALIZED q-BESSEL FUNCTIONS

Artas I., ORHAN H.

COMMUNICATIONS OF THE KOREAN MATHEMATICAL SOCIETY , vol.33, no.2, pp.535-547, 2018 (ESCI)

Certain classes of bi-univalent functions with bounded boundary variation

ORHAN H., MAGESH N., Balaji V. K.

TBILISI MATHEMATICAL JOURNAL , vol.10, no.4, pp.17-27, 2017 (ESCI)

On neighborhood and partial sums problem for generalized Sakaguchi type functions

An. S¸tiint¸. Univ. Al. I. Cuza Iaşi. Mat. (N.S.) , vol.2, pp.1-12, 2017 (Peer-Reviewed Journal)

Geometric properties of generalized Struve functions

ORHAN H., YAĞMUR N.

Analele Stiintifice Ale Universitatii Al I Cuza Din Iasi-Serie Noua-Matematica , vol.2, pp.229-244, 2017 (Scopus)

Coefficient estimates for a class of bi-univalent functions associated with quasi-subordination

ORHAN H., NANJUNDAN M., YAMINI J.

Creative Mathematics and Informatics , vol.26, pp.193-199, 2017 (Peer-Reviewed Journal)

PARTIAL SUMS OF NORMALIZED DINI FUNCTIONS

AKTAŞ İ., ORHAN H.

Journal of Classical Analysis , vol.9, pp.127-135, 2016 (Peer-Reviewed Journal)

Fekete-Szego problem for certain classes of Ma-Minda bi-univalent functions

ORHAN H., Magesh N., BALAJİ V. K.

AFRIKA MATEMATIKA , vol.27, pp.889-897, 2016 (ESCI)

Subclasses of analytic functions defined by a generalized differential operator

Int. J. Math. Anal , 2010 (Peer-Reviewed Journal)

Some Subclasses of Close to Convex and Quasi Convex Functions with Respect to k Symmetric Points

WANG Z. G., CHUN Y. G., ORHAN H., AKBULUT S.

General Mathematics , vol.15, pp.107-119, 2007 (Peer-Reviewed Journal)

Refereed Congress / Symposium Publications in Proceedings

Neighborhoods and Partial Sums of Meromorphic Functions Defined by Integral Operator

ARSLAN U., ORHAN H., ÇAĞLAR M.

7 th INTERNATIONAL CONFERENCE ON MATHEMATICS “An Istanbul Meeting for World Mathematicians” 11-13 July 2023, Istanbul, Turkey, İstanbul, Turkey, 11 - 13 July 2023

Convexity of Certain Integral Operator Defined by Le Roy-Type Mittag-Leffler Functions

ARIKAN H., ORHAN H., ÇAĞLAR M.

7 th INTERNATIONAL CONFERENCE ON MATHEMATICS “An Istanbul Meeting for World Mathematicians” 11-13 July 2023, Istanbul, Turkey, İstanbul, Turkey, 11 - 13 July 2023, pp.215-225

Zalcman Functional for Alpha-Convex Functions Associated with the Exponential Function

ARIKAN H., ORHAN H., DENİZ E.

7 th INTERNATIONAL CONFERENCE ON MATHEMATICS “An Istanbul Meeting for World Mathematicians” 11-13 July 2023, Istanbul, Turkey, İstanbul, Turkey, 11 - 13 July 2023

On 𝒒-starlike and 𝒒-convex functions defined by using the function 𝒇δ

Sağsöz F., Orhan H.

5th INTERNATIONAL CONFERENCE ON COMPUTATIONAL MATHEMATICS AND ENGINEERING SCIENCES, Van, Turkey, 8 - 10 June 2021, pp.69

On Convexity Properties of Some q-Bessel Functions

AKTAŞ İ., ORHAN H.

International Conference on Mathematical Studies and Applications 2018 (ICMSA2018), Karaman, Turkey, 4 - 06 October 2018

Some geometric properties of Struve and Lommel functions

AKTAŞ İ., TOKLU E., ORHAN H.

The Third International Conference on Advances in Natural and Applied Sciences (ICANAS 2018), Antalya, Turkey, 9 - 12 May 2018

Radii problems for normalized q-Bessel and Wrıght functions

TOKLU E., AKTAŞ İ., ORHAN H.

The Third International Conference on Advances in Natural and Applied Sciences (ICANAS 2018), Antalya, Turkey, 9 - 12 May 2018

Studies on the radii of uniform convexity of some special functions

AKTAŞ İ., TOKLU E., ORHAN H.

The Third International Conference on Computational Mathematics and Engineering Sciences (CMES-2018), Girne, Cyprus (Kktc), 4 - 06 May 2018

α-Convexity of Some Struve and Lommel Functions

DENİZ E., ORHAN H., ÇAĞLAR M.

4 th INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN PURE AND APPLIED MATHEMATICS, KUŞADASI, Turkey, 11 - 15 May 2017

PARTIAL SUMS OF GENERALIZED STRUVE FUNCTIONS

YAĞMUR N., ORHAN H., AKTAŞ İ.

5th International Conference on Mathematics and Informatics, 4 - 06 September 2015

Bounds for the Second Hankel Determinant of Certain Bi Univalent Functions

ORHAN H., NANJUNDAN M., VK B.

5th International Conference on Mathematics and Informatics, 4 - 06 September 2015

**Coefficient Inequalities for Analytic Functions Belonging to the Subclasses S-(m) (lambda, mu, rho, alpha) and F-(m) (delta, beta, u, gamma)**

ORHAN H., Caglar M., Deniz E.

International Conference on Mathematical Sciences, Bolu, Turkey, 23 - 27 November 2010, vol.1309, pp.169-179

The order of convexity of two p-valent integral operators

Deniz E., Caglar M., ORHAN H.

International Conference on Mathematical Sciences, Bolu, Turkey, 23 - 27 November 2010, vol.1309, pp.234-240

Books

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