TY - JOUR ID - ElAshwah2013 LB - ElAshwah2013 AU - El-Ashwah, R. M. AU - Aouf, M. K. AU - Hassan, A. A. M. AU - Hassan, A. H. TI - A unified representation of some starlike and convex harmonic functions with negative coefficients ST - A unified representation of some starlike and convex harmonic functions with negative coefficients JO - Opuscula Math. JA - Opuscula Math. JF - Opuscula Mathematica PY - 2013 VL - 33 IS - 2 SP - 273 EP - 281 DO - http://dx.doi.org/10.7494/OpMath.2013.33.2.273 UR - http://dx.doi.org/10.7494/OpMath.2013.33.2.273 AB - In this paper we introduce a unified representation of starlike and convex harmonic functions with negative coefficients, related to uniformly starlike and uniformly convex analytic functions. We obtain extreme points, distortion bounds, convolution conditions and convex combinations for this family. KW - harmonic KW - analytic KW - univalent KW - sense-preserving KW - extreme points SN - 1232-9274 ER -