Equilibrium points of logarithmic potentials on convex domains

Details Equilibrium points of logarithmic potentials on convex domains Equilibrium points of logarithmic potentials on convex domains

2006-01-30

arxiv.org/abs/math/0601729v1

Mathematics

Complex Variables

Scientific paper

Let $D$ be a convex domain in the plane. Let $a_k$ be summable positive constants and let each $z_k$ lie in $D$. If the $z_k$ converge sufficiently rapidly to a boundary point of $D$ from within an appropriate Stolz angle then the function $f(z) = \sum_{k=1}^\infty a_k /(z - z_k)$ 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.

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