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20192023
most citedOn the Number of Equilibria Balancing Newtonian Point Masses with a Central Force

2 citations · 2 across the 3 of their papers we have counts for

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math-ph2023

Multiplane gravitational lenses with an abundance of images

Charles R. Keeton, Erik Lundberg, Sean Perry

We consider gravitational lensing of a background source by a finite system of point-masses. The problem of determining the maximum possible number of lensed images has been comple…

math.CV2023

On the valence of logharmonic polynomials

Dmitry Khavinson, Erik Lundberg, Sean Perry

Investigating a problem posed by W. Hengartner (2000), we study the maximal valence (number of preimages of a prescribed point in the complex plane) of logharmonic polynomials, i.e…