摘要： A complex-valued harmonic function that is univalent and sense preserving in the unit disk U can be written in the form of f = h + g, where h and g are analytic in U. We define and investigate a new class LHλ(α,β) by generalized Salagean operator of harmonic univalent functions. We give sufficient coefficient conditions for normalized harmonic functions in the class LHλ(α,β). These conditions are also shown to be necessary when the coefficients are negative. This leads to distortion bounds and extreme points.
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