18.152 Introduction to Partial Differential Equations, Fall 2004 Bằng Staffilani, Gigliola, Vasy, Andras

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The almost everywhere convergence of eigenfunction expansions of elliptic differential operators in the Torus Bằng Matarneh, Ehab Salem

“…Spectral theory of the elliptic differential operators is an extremely rich field which has been studied by many qualitative and quantitative techniques like Sturm-Liouville theory, separation of variables, Fourier and Laplace transforms, perturbation theory, eigenfunction expansions, variational methods, microlocal analysis, stochastic analysis and numerical methods including finite elements. …”
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