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Issue 4, 2024
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PACS numbers

04.20.Fy Canonical formalism, Lagrangians, and variational principles
  1. A.A. Logunov, M.A. Mestvirishvili, V.A. Petrov “How were the Hilbert-Einstein equations discovered?” 47 607–621 (2004)
    01.65.+g, 04.20.Cv, 04.20.Fy (all)
  2. A.D. Sakharov “Spectral density of eigenvalues of the wave equation and vacuum polarization” 34 (5) 395–400 (1991)
    04.20.Fy, 04.50.+h, 98.80.Es (all)
  3. L.D. Faddeev “The energy problem in Einstein’s theory of gravitation (Dedicated to the memory of V. A. Fock)” 25 130–142 (1982)
    04.20.Fy, 04.50.+h (all)
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