Closure of the set of pseudodifferential operators

Jean Nourrigat

Comptes Rendus. Mathématique, Volume 350 (2012) p. 355-358

States of a one dimensional quantum crystal

Laurent Amour; Claudy Cancelier; Pierre Levy-Bruhl; Jean Nourrigat

Comptes Rendus. Mathématique, Volume 336 (2003) p. 981-984