81Qxx General mathematical topics and methods in quantum theory

• 81Q05 Closed and approximate solutions to the Schrodinger, 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 {58F13}
• 81Q60 Supersymmetric quantum mechanics
• 81Q99 None of the above but in this section