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SUMMARY:Martin Vogel (Université de Strasbourg)
DTSTART:20200515T120000Z
DTEND:20200515T130000Z
DTSTAMP:20260423T004914Z
UID:MEGA/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/MEGA/1/">Spe
 ctra of Toeplitz matrices subject to small random noise.</a>\nby Martin Vo
 gel (Université de Strasbourg) as part of Séminaire MEGA\n\n\nAbstract\n
 The spectra of nonselfadjoint linear operators can be very unstable and se
 nsitive to small perturbations. This phenomenon is usually referred to as 
 “pseudospectral effect”. To explore this spectral instability we study
  the spectra of small random perturbations of non-selfadjoint operators in
  the case of Toeplitz matrices and in the case of the Toeplitz quantizatio
 n of complex-valued functions on the torus. We will discuss recent results
  by Sjöstrand\, Vogel and by Basak\, Paquette and Zeitouni\, describing t
 he distribution of the eigenvalues in various regimes and settings.\n
LOCATION:https://researchseminars.org/talk/MEGA/1/
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