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	STUDIA MATHEMATICA - Issue no. 2 / 2018

	Article:	RADII OF HARMONIC MAPPING WITH FIXED SECOND COEFFICIENTS IN THE PLANE. Authors: RASOUL AGHALARY, ALI MOHAMMADIAN.


	Abstract: In this paper, we investigate the radii problem for harmonic functions with a fixed coefficient and determine the radii of univalence, stable starlikness, stable convexity, fully starlikness and fully convexity of order α for these type of functions. All results are sharp. Also these results generalize and improve some results in the literature. Mathematics Subject Classification (2010): 30C45, 30C80. Keywords: Stable starlike functions, stable univalent function, stable convex function, radii problem.




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