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Equilibrium points of logarithmic potentials on convex domains
Authors:J. K. Langley
Affiliation:School of Mathematical Sciences, University of Nottingham, NG7 2RD, United Kingdom
Abstract:Let $ D$ be a convex domain in $ mathbb{C}$. Let $ a_k > 0$ be summable constants and let $ z_k in D$. If the $ z_k$ converge sufficiently rapidly to $ zeta in partial D$ from within an appropriate Stolz angle, then the function $ sum_{k=1}^infty a_k /( z - z_k ) $ has infinitely many zeros in $ D$. An example shows that the hypotheses on the $ z_k$ are not redundant and that two recently advanced conjectures are false.

Keywords:Critical points   potentials   zeros of meromorphic functions.
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