Title of article :
Bi-Concave Functions Involving a Differential Operator
Author/Authors :
Altınkaya, S Uludag University , Yalcın, S Uludag University
Abstract :
ThepurposeofthepresentpaperistointroduceaclassDk,αλ,δC0(β)ofbi-concavefunctionsdefinedbyadifferentialoperator.WefindestimatesontheTaylor-Maclaurincoefficients|a2|and|a3|forfunc-tionsinthisclass.Severalconsequencesoftheseresultsarealsopointedoutintheformofcorollaries
Keywords :
Bi-concave functions , differential operator , coefficient estimates
