On certain meromorphic functions with positive coefficients (Q5916141)

The authors have obtained coefficient inequalities, distortion and growth estimates, radii of starlikeness and convexity and closure results for a class of meromorphic functions \(f(z)\) with positive coefficients satisfying \(| z(I^k f(z))'/I^k f(z)+1| < | z(I^k f(z))'/I^k f(z)+2\alpha -1| \) (\(0\leq \alpha <1\)) where \(I^k\) is the meromorphic analogue of the Salagean derivative operator.