Coefficient Estimates for Some Subclasses of Analytic and Bi-Univalent Functions Associated with Conic Domain

Authors

  • Bilal Khan Department of Mathematics, Abbottabad University of Science and Technology, Abbottabad, Pakistan.
  • Gul Mehtab Khan Department of Mathematics, Abbottabad University of Science and Technology, Abbottabad, Pakistan.
  • Muhamamd Tahir Department of Mathematics, Abbottabad University of Science and Technology, Abbottabad, Pakistan.
  • Nazar Khan Department of Mathematics, Abbottabad University of Science and Technology, Abbottabad, Pakistan.
  • Qazi Zahoor Ahmad Department of Mathematics, Abbottabad University of Science and Technology, Abbottabad, Pakistan.
Abstract:

The main objective of this investigation is to introduce certain new subclasses of the class $Sigma $ of bi-univalent functions by using concept of conic domain. Furthermore, we find non-sharp estimates on the first two Taylor-Maclaurin coefficients $ left vert a_{2}right vert $ and $left vert a_{3}right vert $ for functions in these new subclasses. We consider various corollaries and consequences of our main results. We also point out relevant connections to some of the earlier known developments.

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Journal title

volume 16  issue 1

pages  69- 81

publication date 2019-10-01

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