Equality of harmonic and analytic shear classes for normalized univalent mappings

From papers

Let SH0\mathcal{S}^0_H be the class of normalized sense-preserving univalent harmonic mappings f=h+gf=h+\overline{g} in the unit disk with fz(0)=0f_{\overline z}(0)=0. Let S\mathcal{S} be the classical normalized analytic univalent class, and let SH0(S)\mathcal{S}^0_H(\mathcal{S}) denote the subclass for which some analytic shear belongs to S\mathcal{S}. Shear-class equality conjecture. For every f=h+gSH0f=h+\overline{g}\in\mathcal{S}^0_H, there exists at least one θR\theta\in\mathbb{R} such that h+eiθgSh+e^{i\theta}g\in\mathcal{S}; equivalently,

SH0=SH0(S).\mathcal{S}^0_H=\mathcal{S}^0_H(\mathcal{S}).

The conjecture asks whether every normalized univalent harmonic mapping admits an analytic univalent shear. The source gives no resolution, so the problem remains open.

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Sources & referencesView supporting material

Primary source

S. Ponnusamy and A. Sairam Kaliraj, “On the coefficient conjecture of Clunie and Sheil-Small on Univalent Harmonic Mappings”, arXiv:1403.5619 (2014).

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