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81Qxx

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General mathematical topics and methods in quantum theory
  • 81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other quantum-mechanical equations
  • 81Q10 Selfadjoint operator theory in quantum theory, including spectral analysis
  • 81Q15 Perturbation theories for operators and differential equations
  • 81Q20 Semiclassical techniques including WKB and Maslov methods
  • 81Q30 Feynman integrals and graphs; applications of algebraic topology and algebraic geometry [See also 14D05, 32S40]
  • 81Q40 Bethe-Salpeter and other integral equations
  • 81Q50 Quantum chaos [See also 37Dxx]
  • 81Q60 Supersymmetric quantum mechanics
  • 81Q70 Differential-geometric methods, including holonomy, Berry and Hannay phases, etc.
  • 81Q99 None of the above, but in this section