81Q05  Closed and approximate solutions to the Schrödinger, Dirac, KleinGordon and other quantummechanical 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  BetheSalpeter and other integral equations


81Q50  Quantum chaos [See also 37Dxx]


81Q60  Supersymmetric quantum mechanics


81Q70  Differentialgeometric methods, including holonomy, Berry and Hannay phases, etc.


81Q99  None of the above, but in this section

