Mathematics – Complex Variables
Scientific paper
2011-08-20
Applied Mathematics Letters, Vol. 25 (2012), Pages 344-351
Mathematics
Complex Variables
Scientific paper
10.1016/j.aml.2011.09.012
Estimates on the initial coefficients are obtained for normalized analytic functions $f$ in the open unit disk with $f$ and its inverse $g=f^{-1}$ satisfying the conditions that $zf'(z)/f(z)$ and $zg'(z)/g(z)$ are both subordinate to a starlike univalent function whose range is symmetric with respect to the real axis. Several related classes of functions are also considered, and connections to earlier known results are made.
Ali Rosihan M.
Keong Lee See
Ravichandran V.
Supramaniam Shamani
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