Keywords
best subordinant
differential operator.
Abstract
In the present paper we obtain strong differential superordinations for the differential operator 
defined as a convex combination of the extended Sălăgean operator and the extended Ruscheweyh derivative, 
and 
is the class of normalized analytic functions, 
the extended Ruscheweyh derivative, 
the extended Sălăgean operator.
References
Alb Lupa A, Oros, Gh. Oros GI. On special strong differential subordinations using S l gean and Ruscheweyh operators. J Comput Anal Appl 2012; 14(2): 266-270.
Oros GI. Strong differential superordination. Acta Universitatis Apulensis Nr. 2009; 19: 101-106.
Oros GI. On a new strong differential subordination. Acta Universitatis Apulensis 2012; 32: 6-15.
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