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Convexity of functions defined by differential inequalities and integral operators. (English) Zbl 1360.30014

Summary: The convexity conditions for analytic functions defined in the open unit disk satisfying certain second-order and third-order differential inequalities are obtained. As a consequence, conditions for convexity of functions defined by integral operators are also determined.

MSC:

30C45 Special classes of univalent and multivalent functions of one complex variable (starlike, convex, bounded rotation, etc.)
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[1] Ali, R.M.: On a subclass of starlike functions. Rocky Mt. J. Math. 24(2), 447-451 (1994) · Zbl 0816.30010 · doi:10.1216/rmjm/1181072410
[2] Ali, R.M., Badghaish, A.O., Ravichandran, V., Swaminathan, A.: Starlikeness of integral transforms and duality. J. Math. Anal. Appl. 385(2), 808-822 (2012) · Zbl 1244.30008 · doi:10.1016/j.jmaa.2011.07.014
[3] Ali, R.M., Lee, S.K., Subramanian, K.G., Swaminathan, A.: A third-order differential equation and starlikeness of a double integral operator. Abstr. Appl. Anal. 901235, 10 (2011) · Zbl 1207.30012
[4] Ali, R.M., Nargesi, M.M., Ravichandran, V.: Convexity of integral transforms and duality. Complex Var. Elliptic Equ. 58(11), 1569-1590 (2013) · Zbl 1381.30006 · doi:10.1080/17476933.2012.693483
[5] Ali, R.M., Singh, V.: Convexity and starlikeness of functions defined by a class of integral operators. Complex Var. Theory Appl. 26(4), 299-309 (1995) · Zbl 0851.30005 · doi:10.1080/17476939508814791
[6] Al-Amiri, H., Mocanu, P. T.: Some simple criteria of starlikeness and convexity for meromorphic functions. Mathematica 37(60), 1-2, 11-20 (1995) · Zbl 0884.30009
[7] Antonino, J.A., Miller, S.S.: Third-order differential inequalities and subordinations in the complex plane. Complex Var. Elliptic Equ. 56(5), 439-454 (2011) · Zbl 1220.30035 · doi:10.1080/17476931003728404
[8] Chandrashekar, R., Ali, R.M., Subramanian, K.G., Swaminathan, A.: Starlikeness of functions defined by third-order differential inequalities and integral operators. Abstr. Appl. Anal. 723097, 6 (2014) · Zbl 1474.30064
[9] Cho, N.E., Bulboaca, T.: A class of integral operators preserving subordination and superordination. Complex Var. Elliptic Equ. 58(7), 909-921 (2013) · Zbl 1283.30020 · doi:10.1080/17476933.2011.603416
[10] Fournier, R., Mocanu, P.: Differential inequalities and starlikeness. Complex Var. Theory Appl. 48(4), 283-292 (2003) · Zbl 1034.30008 · doi:10.1080/0278107031000073614
[11] Hallenbeck, D.J., Ruscheweyh, S.: Subordination by convex functions. Proc. Amer. Math. Soc. 52, 191-195 (1975) · Zbl 0311.30010 · doi:10.1090/S0002-9939-1975-0374403-3
[12] Kuroki, K., Owa, S.: Double integral operators concerning starlike of order \[\beta\] β. Int. J. Differ. Equ. 2009, 737129, 13 (2009) · Zbl 1201.30015
[13] Miller, S.S., Mocanu, P.T.: Differential subordinations. Monographs and Textbooks in Pure and Applied Mathematics, 225. Marcel Dekker Inc, New York (2000) · Zbl 1034.30008
[14] Miller, S.S., Mocanu, P.T.: Double integral starlike operators. Integral Transforms Spec. Funct. 19(7-8), 591-597 (2008) · Zbl 1156.30014 · doi:10.1080/10652460802045282
[15] Obradovic, M.: Simple sufficient conditions for univalence. 4th Symposium on Mathematical Analysis and Its Applications (Arandelovac, 1997). Mat. Vesnik 49(3-4), 241-244 (1997) · Zbl 0992.30005
[16] Obradovic, M., Ponnusamy, S.: A class of univalent functions defined by a differential inequality. Kodai Math. J. 34(2), 169-178 (2011) · Zbl 1230.30010 · doi:10.2996/kmj/1309829544
[17] Ponnusamy, S., Juneja, O.P.: Third-order differential inequalities in the complex plane. Current Topics in Analytic Function Theory. World Sci. Publ. River Edge, NJ (1992) · Zbl 0991.30012
[18] Shiraishi, H., Kuroki, K., Owa, S.: Some classes of order \[\alpha\] α for second-order differential inequalities. Electron. J. Math. Anal. Appl. 1(2), 149-155 (2013) · Zbl 1463.30085
[19] Suffridge, T.J.: Some remarks on convex maps of the unit disk. Duke Math. J. 37, 775-777 (1970) · Zbl 0206.36202 · doi:10.1215/S0012-7094-70-03792-0
[20] Yagmur, N., Orhan, H.: Starlikeness and convexity of generalized Struve functions. Abstr. Appl. Anal. 954513, 6 (2013) · Zbl 1272.30033
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