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Analysis Seminar

Thursday, December 10, 2020
9:00am to 9:55am
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The hole event for Gaussian complex zeros and the emergence of quadrature domains
Aron Wennman, Department of Mathematics, KTH Royal Institute of Technology,

The Gaussian Entire Function (GEF) is a distinguished random Taylor series with independent complex Gaussian coefficients, whose zero set is invariant with respect to isometries of the plane. The topic of this talk is the zero distribution of the GEF, conditioned on the event that no zero lies in a given (large) region. For circular holes Ghosh and Nishry observed that as the radius of the hole tends to infinity, the density of zeros vanishes not only on the given hole, but also on an annulus beyond the (rescaled) hole — a 'forbidden region' emerges.

We are concerned with the shape of the forbidden region for general simply connected holes. I plan to discuss how one can study this problem through a type of constrained obstacle problem, and a curious emergence of quadrature domains.

Based on joint work with Alon Nishry.

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