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  1. Article

    Open Access

    Upper bound for the second and third Hankel determinants of analytic functions associated with the error function and q-convolution combination

    Recently, El-Deeb and Cotîrlă (Mathematics 11:11234834, 2023) used the error function together with a q-convolution to introduce a new operator. By means of this operator the following class

    Hari M. Srivastava, Daniel Breaz in Journal of Inequalities and Applications (2024)

  2. Article

    Open Access

    The study of coefficient estimates and Fekete–Szegö inequalities for the new classes of m-fold symmetric bi-univalent functions defined using an operator

    The objective of this paper is to introduce new classes of m-fold symmetric bi-univalent functions. We discuss estimates on the Taylor–Maclaurin coefficients ...

    Daniel Breaz, Luminiţa-Ioana Cotîrlă in Journal of Inequalities and Applications (2023)

  3. Article

    Open Access

    Sufficient Conditions for Univalence of an Integral Operator

    In this paper we have introduced an integral general operator. For this general operator which is a generalization of more known integral operators we have demonstrated some univalence properties.

    Georgia Irina Oros, Gheorghe Oros, Daniel Breaz in Journal of Inequalities and Applications (2008)

  4. Article

    Open Access

    On the Univalence Criterion of a General Integral Operator

    In this paper we considered an general integral operator and three classes of univalent functions for which the second order derivative is equal to zero. By imposing supplimentary conditions for these function...

    Daniel Breaz, HÖzlem Güney in Journal of Inequalities and Applications (2008)

  5. Article

    Open Access

    Sufficient Univalence Conditions for Analytic Functions

    We consider a general integral operator and the class of analytic functions. We extend some univalent conditions of Becker's type for analytic functions using a general integral transform.

    Daniel Breaz, Nicoleta Breaz in Journal of Inequalities and Applications (2008)

  6. Article

    Open Access

    Certain Integral Operators on the Classes and

    We consider the classes and of the analytic functions and ...

    Daniel Breaz in Journal of Inequalities and Applications (2008)

  7. Article

    Open Access

    A Convexity Property for an Integral Operator on the Class

    We consider an integral operator, , for analytic functions,

    Daniel Breaz in Journal of Inequalities and Applications (2008)