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Number Theory Seminar

The Robin problem on rectangles

Igor Wigman (Kings College London)

Location:  Zoom
Date & time: Tuesday, 22 February 2022 at 2:00PM - 3:00PM

Abstract: This talk is based on a joint work with Zeev Rudnick. We study the statistics and the arithmetic properties of the Robin spectrum of a rectangle. A number of results are obtained for the multiplicities in the spectrum, depending on the Diophantine nature of the aspect ratio. In particular, it is shown that for the square, unlike the case of Neumann eigenvalues where there are unbounded multiplicities of arithmetic origin, there are no multiplicities in the Robin spectrum for sufficiently small (but nonzero) Robin parameter except a systematic symmetry. In addition, we show that the pair correlation function of the Robin spectrum on a Diophantine rectangle is Poissonian.

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