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UID:20260625T061243EDT-7159gC5tZw@132.216.98.100
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DESCRIPTION:Dear Colleagues\,\n\nIt is our pleasure to invite you to partic
 ipate in the Special Session of the Montreal-Quebec Analysis Seminar in ho
 nour of the 65th birthday of our friend and collaborator Nikolai Nadirashv
 ili.\n\nThe program (see details below) includes talks by Aleksandr Loguno
 v (Princeton) and Vladimir Sverak (Minnesota)\, followed by a Zoom banquet
 .\n\nWe would appreciate it if you could say a few words about Nikolai dur
 ing the banquet - please let us know if you would be able to do it.\n\nLoo
 king forward to seeing you at the seminar.\n\nBest wishes\,\n\nDima Jakobs
 on & Iosif Polterovich\n\nAlexandr Logunov (Princeton)\n	Title: Nodal sets\
 , Quasiconformal mappings and how to apply them to Landis' conjecture.\n	Ab
 stract: A while ago Nadirashvili proposed a beautiful idea how to attack p
 roblems on zero sets of Laplace eigenfunctions using quasiconformal mappin
 gs\, aiming to estimate the length of nodal sets (zero sets of eigenfuncti
 ons) on closed two-dimensional surfaces. The idea have not yet worked out 
 as it was planned. However it appears to be useful for Landis' Conjecture.
  We will explain how to apply the combination of quasiconformal mappings a
 nd zero sets to quantitative properties of solutions to $\Delta u + V u =0
  on the plane\, where $V$ is a real\, bounded function. The method reduces
  some questions about solutions to Shrodinger equation $\Delta u + V u =0$
  on the plane to questions about harmonic functions. Based on a joint work
  with E.Malinnikova\, N.Nadirashvili and F. Nazarov.\n	 \n\n11:00-11:50am\,
  Eastern time. Vladimir Sverak (Minneapolis)\n\nTitile: Liouville theorems
  for the Navier-Stokes equations\n	Abstract: Assume u is a smooth\, bounded
 \, and divergence-free field on R^3 satisfying the steady Navier-Stokes eq
 uation -\Delta u +u\nabla u + \nabla p=0 (for a suitable function p). Does
  u have to be constant? We still don't know. Interesting things are known 
 and Nikolai made important contributions to our knowledge concerning this 
 question. Similar problems can also be considered for various model equati
 ons. The lecture will concern various aspects of this problem.\n	\n	12:15-13
 :30\, Eastern time: Zoom banquet\n\nFOR ZOOM MEETING INFORMATION PLEASE CO
 NTACT dmitry.jakobson [at] mcgill.ca\n\n \n
DTSTART:20200626T140000Z
DTEND:20200626T150000Z
SUMMARY:Special seminar on the occasion of the 65th birthday of N. Nadirash
 vili
URL:/mathstat/channels/event/special-seminar-occasion-
 65th-birthday-n-nadirashvili-322638
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