Abstract
The study of extremal problems for Fredholm eigenvalues was initiated by Schiffer in the context of the existence of conformal maps onto canonical domains.
We present a different approach to solving rather general extremal problems for Fredholm eigenvalues related to appropriate univalent functions with quasiconformal extensions. It involves the complex geometry of the universal Teichmüller space.
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Krushkal, S. Extremal problems for Fredholm eigenvalues. Isr. J. Math. 172, 279–307 (2009). https://doi.org/10.1007/s11856-009-0073-2
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DOI: https://doi.org/10.1007/s11856-009-0073-2