0
Claude Helffer died in 2004.
Claude Helffer was born on June 18, 1922.
Bernard Helffer has written:
'Hypoelliptic estimates and spectral theory for Fokker-Planck operators and Witten Laplacians' -- subject(s): Hypoelliptic operators, Spectral theory (Mathematics)
'Re sonances en limite semi-classique'
Claude Rains Claude Rains