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 analytic functions, anayltic continuation, integral transforms, asymptotic series, generalized functions, eigenfunction expansions, Green functions, boundary-value problems, group theory, dispersion theory, Sturm-Liouville theory, Legendre functions, Legendre polynomials, Legendre expansion, Bessel functions, Cauchy, Cauchy-Goursat, Cauchy-Riemann, integration, finite groups, continuous groups, singularity, Delta functions, Fourier transform, Laplace transform, Hilbert spaces, lie groups, lie algebr, rotation groups
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