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Variants of Ahlfors' lemma and properties of the logarithmic potentials

As a special class of conformal metrics with negative curvatures, SK-metrics play a crucial role in metric spaces. This paper concerns the variants of Ahlfors' lemma in an SK-metric space and gives a higher order derivative formula for the logarithmic potential function, which can be applied for the estimates near the singularity of a conformal metric with negative curvatures.

preprint2013arXivOpen access
Tanran Zhang
math.CV
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Tanran Zhang

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