Operator Theory Operator theory Partial Differential Equations Partial differential equations Functional Analysis Functional analysis Functions of complex variables Global Analysis and Analysis on Manifolds Global analysis (Mathematics) Lie groups Manifolds (Mathematics) Several Complex Variables and Analytic Spaces Topological Groups, Lie Groups Topological groups Abstract Harmonic Analysis Analysis Analysis (Mathematics) Approximation theory Approximations and Expansions Fourier Analysis Fourier analysis Harmonic analysis Integral Equations Integral equations Mathematical analysis Numerical Analysis Numerical analysis Quantum Physics Quantum physics