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Thursday, March 30, 2023

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4:00pm
Degeneration of hyperbolic surfaces and spectral gaps for large genus [3]
03/30/2023 - 4:00pm

The study of "small" eigenvalues of the Laplacian on hyperbolic surfaces has a long history and has recently seen many developments. In this talk I will focus on the recent work (joint with Yunhui Wu and Haohao Zhang) on the higher spectral gaps, where we study the differences of consecutive eigenvalues up to $\lambda_{2g-2}$ for genus $g$ hyperbolic surfaces. We show that the supremum of such spectral gaps over the moduli space has infimum limit at least 1/4 as genus goes to infinity. The analysis relies on previous joint works with Richard Melrose on degenerating hyperbolic surfaces

Location:
LOM 205
 
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[1] https://calendar.math.yale.edu/calendar/grid/day/2023-03-29 [2] https://calendar.math.yale.edu/calendar/grid/day/2023-03-31 [3] https://calendar.math.yale.edu/event/degeneration-hyperbolic-surfaces-and-spectral-gaps-large-genus [4] https://calendar.math.yale.edu/print/list/calendar/grid/day/2023-03-30 [5] webcal://calendar.math.yale.edu/calendar/export.ics