Johannes Sjöstrand

Johannes Sjöstrand (born 1947) is a Swedish mathematician, specializing in partial differential equations and functional analysis.

Sjöstrand received his doctorate in 1972 from Lund University under Lars Hörmander.[1] Sjöstrand taught at the University of Paris XI and he is a professor at the University of Burgundy in Dijon.

He is a member of the Royal Swedish Academy of Sciences[2] and, since 2017, a member of the American Academy of Arts and Sciences.

His research deals with microlocal analysis. He has investigated, inter alia, the Schrödinger equation of an electron in a magnetic field (with a spectrum of the Hofstadter butterfly),[3] resonances in the semiclassical limit, and quantum tunneling in the semiclassical limit.

Selected publications

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References

  1. Johannes Sjöstrand at the Mathematics Genealogy Project
  2. entry at the Kungliga Vetenskapsakademien website
  3. Jean Bellissard Le papillon de Hofstadter, d'après B. Helffer et J. Sjöstrand, Séminaire Bourbaki, Nr. 745, 1991/92, Online Archived 2014-02-01 at the Wayback Machine
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