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Additions to the principle of harmonic Nevanlinna measure - MaRDI portal

Additions to the principle of harmonic Nevanlinna measure (Q2518082)

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Additions to the principle of harmonic Nevanlinna measure
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    Additions to the principle of harmonic Nevanlinna measure (English)
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    12 January 2009
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    Assume that \(\mathbb{D}\), \(G\subset\overline{\mathbb{C}}\), are domains bounded by a finite number of Jordan arcs, \(w(z)\) is meromophic on \(D\) and continuous on \(\overline D\), \(w'(z)\neq 0\) for \(z\in D\), \(G\subset w(D)\), and \(w(\partial D)\subset\partial G\). Let \(\alpha_z\subset\partial D\) consist of a finite number of arcs, \(w_0\in G\), and \(z_k\in G\), \(k= 1,2,\dots,m\) be solutions of the equation \(w(z)= w_0\). For the harmonic measure \(\omega\), the following inequality is proved: \[ \omega(w_0, w(\alpha_z)\,G)\leq \sum_k\omega(z_k, \alpha_z,D). \] A similar result is given in the case when \(D\), \(G\) are bounded by a finite number of Jordan curves and \(w(z)\) is rational.
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    harmonic Nevanlinna measure
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    Jordan arc
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    meromorphic function
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    rational function
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    minimum principle
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    Green function
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    linear fractional mapping
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