415 citations · 1.2k across the 61 of their papers we have counts for
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math.CV2009★ 12 cited
On the number of solutions of a transcendental equation arising in the theory of gravitational lensing
Walter Bergweiler, Alexandre Eremenko
The equation in the title describes the number of bright images of a point source under lensing by an elliptic object with isothermal density. We prove that this equation has at mo…
math.CV2009★ 12 cited
The size of Wiman-Valiron disks
Walter Bergweiler
Wiman-Valiron theory and results of Macintyre about "flat regions" describe the asymptotic behavior of entire functions in certain disks around points of maximum modulus. We estima…