Journal of Chemical Sciences

, Volume 96, Issue 3, pp 121–126

A generalization of Brillouin's theorem and the stability conditions in the quantum-mechanical variation principle in the case of general trial wave functions

  • Per-Olov Löwdin

DOI: 10.1007/BF02974145

Cite this article as:
Löwdin, PO. Proc. Indian Acad. Sci. (Chem. Sci.) (1986) 96: 121. doi:10.1007/BF02974145


In connection with the quantum-mechanical variation principle, it is shown that the Brillouin theorem and the stability conditions usually associated with the Hartree-Fock scheme in the many-electron theory may be generalized to the case of arbitrary trial functions depending on a set of linear or non-linear complex parameters.

Copyright information

© Indian Academy of Sciences 1986

Authors and Affiliations

  • Per-Olov Löwdin
    • 1
    • 2
  1. 1.Quantum Theory Project, Departments of Chemistry and PhysicsUniversity of FloridaGainesvilleUSA
  2. 2.Uppsala UniversityUppsalaSweden

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