See Keong Lee

Learn More
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(More)
We introduce a class T S g p (α) of analytic functions with negative coefficients defined by convolution with a fixed analytic function g(z) = z + P ∞ n=2 bnz n , bn > 0, |z| < 1. We obtain the coefficient inequality, coefficient estimate, distortion theorem, a convolution result, extreme points and integral representation for functions in the class T S g p(More)
  • 1