Ciro Santilli
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Separation of variables | 🗖 nosplit | ↑ parent "Theoretical methods to solve partial differential equation" | 55

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Naturally leads to the Fourier series, see: solving partial differential equations with the Fourier series, and to other analogous expansions:
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One notable application is the solution of the Schrodinger equation via the time-independent Schrodinger equation.
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