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Coefficient estimate of biunivalent functions of complex order associated with the Hohlov operator. (English) Zbl 1310.30016

Summary: We introduce and investigate a new subclass of the function class \(\Sigma\) of biunivalent functions of complex order defined in the open unit disk, which are associated with the Hohlov operator, satisfying subordinate conditions. Furthermore, we find estimates on the Taylor-Maclaurin coefficients \(| a_2|\) and \(| a_3|\) for functions in this new subclass. Several, known or new, consequences of the results are also pointed out.

MSC:

30C45 Special classes of univalent and multivalent functions of one complex variable (starlike, convex, bounded rotation, etc.)
Full Text: DOI

References:

[1] W. C. Ma and D. Minda, “A unified treatment of some special classes of functions,” in Proceedings of the Conference on Complex Analysis, Tianjin, 1992, 157-169, vol. 1 of Conference Proceedings and Lecture Notes in Analysis, International Press, Cambridge, Mass, USA, 1994. · Zbl 0823.30007
[2] Y. E. Khokhlov, “Convolution operators that preserve univalent functions,” Ukrainskiĭ Matematicheskiĭ Zhurnal, vol. 37, no. 2, pp. 220-226, 1985.
[3] Y. E. Khokhlov, “Hadamard convolutions, hypergeometric functions and linear operators in the class of univalent functions,” Doklady Akademiya Nauk Ukrainskoĭ SSR. A. Fiziko-Matematicheskie i Tekhnicheskie Nauki, no. 7, pp. 25-27, 1984. · Zbl 0572.30008
[4] J. Dziok and H. M. Srivastava, “Classes of analytic functions associated with the generalized hypergeometric function,” Applied Mathematics and Computation, vol. 103, no. 1, pp. 1-13, 1999. · Zbl 0937.30010 · doi:10.1016/S0096-3003(98)10042-5
[5] J. Dziok and H. M. Srivastava, “Certain subclasses of analytic functions associated with the generalized hypergeometric function,” Integral Transforms and Special Functions, vol. 14, no. 1, pp. 7-18, 2003. · Zbl 1040.30003 · doi:10.1080/10652460304543
[6] D. A. Brannan, J. Clunie, and W. E. Kirwan, “Coefficient estimates for a class of star-like functions,” Canadian Journal of Mathematics, vol. 22, pp. 476-485, 1970. · Zbl 0197.35602 · doi:10.4153/CJM-1970-055-8
[7] D. A. Brannan and J. G. Clunie, Aspects of Contemporary Complex Analysis, Academic Press, London, UK, 1980. · Zbl 0483.00007
[8] D. A. Brannan and T. S. Taha, “On some classes of bi-univalent functions,” Studia Universitatis Babe\cs-Bolyai Mathematica, vol. 31, no. 2, pp. 70-77, 1986. · Zbl 0614.30017
[9] M. Lewin, “On a coefficient problem for bi-univalent functions,” Proceedings of the American Mathematical Society, vol. 18, pp. 63-68, 1967. · Zbl 0158.07802 · doi:10.2307/2035225
[10] E. Netanyahu, “The minimal distance of the image boundary from the origin and the second coefficient of a univalent function in zx3c;1,” Archive for Rational Mechanics and Analysis, vol. 32, pp. 100-112, 1969. · Zbl 0186.39703 · doi:10.1007/BF00247676
[11] T. S. Taha, Topics in univalent function theory [Ph.D. thesis], University of London, London, UK, 1981.
[12] B. A. Frasin and M. K. Aouf, “New subclasses of bi-univalent functions,” Applied Mathematics Letters, vol. 24, no. 9, pp. 1569-1573, 2011. · Zbl 1218.30024 · doi:10.1016/j.aml.2011.03.048
[13] T. Hayami and S. Owa, “Coefficient bounds for bi-univalent functions,” Panamerican Mathematical Journal, vol. 22, no. 4, pp. 15-26, 2012. · Zbl 1267.30040
[14] X. F. Li and A. P. Wang, “Two new subclasses of bi-univalent functions,” International Mathematical Forum, vol. 7, no. 29-32, pp. 1495-1504, 2012. · Zbl 1263.30006
[15] H. M. Srivastava, A. K. Mishra, and P. Gochhayat, “Certain subclasses of analytic and bi-univalent functions,” Applied Mathematics Letters, vol. 23, no. 10, pp. 1188-1192, 2010. · Zbl 1201.30020 · doi:10.1016/j.aml.2010.05.009
[16] Q. H. Xu, Y. C. Gui, and H. M. Srivastava, “Coefficient estimates for a certain subclass of analytic and bi-univalent functions,” Applied Mathematics Letters, vol. 25, no. 6, pp. 990-994, 2012. · Zbl 1244.30033 · doi:10.1016/j.aml.2011.11.013
[17] Q. H. Xu, H. G. Xiao, and H. M. Srivastava, “A certain general subclass of analytic and bi-univalent functions and associated coefficient estimate problems,” Applied Mathematics and Computation, vol. 218, no. 23, pp. 11461-11465, 2012. · Zbl 1284.30009 · doi:10.1016/j.amc.2012.05.034
[18] E. Deniz, “Certain subclasses of bi-univalent functions satisfying subordinate conditions,” Journal of Classical Analysis, vol. 2, no. 1, pp. 49-60, 2013.
[19] R. M. Ali, S. K. Lee, V. Ravichandran, and S. Supramaniam, “Coefficient estimates for bi-univalent Ma-Minda starlike and convex functions,” Applied Mathematics Letters, vol. 25, no. 3, pp. 344-351, 2012. · Zbl 1246.30018 · doi:10.1016/j.aml.2011.09.012
[20] T. Panigrahi and G. Murugusundaramoorthy, “Coefficient bounds for bi-univalent analytic functions associated with Hohlov operator,” Proceedings of the Jangjeon Mathematical Society, vol. 16, no. 1, pp. 91-100, 2013.
[21] H. M. Srivastava, G. Murugusundaramoorthy, and N. Magesh, “Certain subclasses of bi-univalent functions associated with the Hohlov operator,” Global Journal of Mathematical Analysis, vol. 1, no. 2, pp. 67-73, 2013.
[22] Z. Peng and Q. Han, “On the coefficients of several classes of bi-univalent functions,” Acta Mathematica Scientia B, vol. 34, no. 1, pp. 228-240, 2014. · Zbl 1313.30067 · doi:10.1016/S0252-9602(13)60140-X
[23] C. Pommerenke, Univalent Functions, Vandenhoeck & Ruprecht, Göttingen, Germany, 1975. · Zbl 0188.38303
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