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1.
Théorie spectrale pour des opérateurs globalement elliptiques/ par B. Helffer. by
  • Helffer, Bernard
Series: Notas de curso (Universidade Federal de Pernambuco. Departamento de Matemática) ; no. 19.
Publication details: Recife: UFPE, 1981
Availability: Items available for loan: Castorina (1)Call number: 515.35 H474t 1981 IMPA.

2.
Hypoellipticité maximale pour des opérateurs polynomes de champs de vecteurs/ Bernard Helffer, Jean Nourrigat. by
  • Helffer, Bernard
  • Nourrigat, Jean
Series: Progress in mathematics
Publication details: Boston: Birkhäuser, 1985
Availability: Items available for loan: Castorina (1)Call number: 515.35 H474h 1985 IMPA.

3.
Introduction to the semi-classical analysis for the Schrödinger operator and applications/ Bernard Helffer. by
  • Helffer, Bernard
Series: Lecture notes in mathematics (Springer-Verlag) ; 1336.
Publication details: Berlin; New York: Springer-Verlag, c1988
Availability: Items available for loan: Castorina (1).

4.
Semiclassical analysis, Witten Laplacians, and statistical mechanics/ Bernard Helffer. by
  • Helffer, Bernard
Series: Series on partial differential equations and applications ; v. 1
Publication details: New Jersey: World Scientific, c2002
Availability: Items available for loan: Castorina (1)Call number: 530.13 H474s 2002 IMPA.

5.
Hypoelliptic estimates and spectral theory for Fokker-Planck operators and Witten Laplacians/ Bernard Helffer, Francis Nier. by
  • Helffer, Bernard
  • Nier, Francis
Series: Lecture notes in mathematics (Springer-Verlag) ; 1862.
Publication details: Berlin: Springer, c2005
Availability: Items available for loan: Castorina (1).

6.
Spectral theory and its applications/ Bernard Helffer. by
  • Helffer, Bernard [author.]
Series: Cambridge studies in advanced mathematics ; 139.
Publisher: New York: Cambridge University Press, 2013
Online access:
Availability: Items available for loan: Castorina (1)Call number: 515.722 H474s 2013 IMPA.

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