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SUMMARY:One can hear the shape of a nearly circular ellipse.
DTSTART;VALUE=DATE-TIME:20190513T141500Z
DTEND;VALUE=DATE-TIME:20190513T151500Z
DTSTAMP;VALUE=DATE-TIME:20191120T091938Z
UID:indico-event-4655@indico.math.cnrs.fr
DESCRIPTION:My talk is about the well-known ``inverse spectral problem'' f
or convex bounded smooth plane domains\, i.e. the Kac problem `can you hea
r the shape of a drum'. The problem is to determine the domain from the ei
genvalues of the Laplacian with Dirichlet (or Neumann) boundary conditions
. It has long been conjectured that ellipses are uniquely determined by th
eir eigenvalues. My talk is about a recent result with Hamid Hezari which
proves that this is true if the ellipse has small eccentricity.\n\nhttps:/
/indico.math.cnrs.fr/event/4655/
LOCATION:UCBL-Braconnier Salle Fokko
URL:https://indico.math.cnrs.fr/event/4655/
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