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Fourier Transform Methods for PDEs

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Maxwell's equations in free space

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Fourier transform Maxwell's equations, solve the system of ODEs for the electric and magnetic fields, and apply inverse Fourier transforms to find the fields in real space.

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Inhomogeneous Helmholtz equation

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Fourier transform the Helmholtz equation, solve the resulting equation in the Fourier domain, then find the solution via inverse Fourier transform.

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Diffusion equation with source term

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Fourier transform the diffusion equation, incorporate the source term in the transformed domain, solve for the transformed solution, and inverse Fourier transform.

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Laplace's equation in the frequency domain

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Fourier transform Laplace's equation, solve the algebraic equations, then apply the inverse Fourier transform to obtain the solution in the spatial domain.

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Heat equation using Fourier transform

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Apply Fourier transform to both sides, solve the resulting ODE, apply inverse Fourier transform to find the solution.

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Korteweg-de Vries (KdV) equation

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Apply Fourier transform to the KdV equation, solve the resulting nonlinear ODE, use inverse scattering transform if needed, then inverse Fourier transform to real space.

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Poisson's equation for electrostatics

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Apply the Fourier transform to both sides of Poisson's equation, solve the resulting algebraic equation in Fourier space, then inverse Fourier transform to get the potential field.

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Wave equation with Fourier transform

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Fourier transform the equation, find general solutions to the resulting ODEs, use initial conditions to find specific solutions, inverse Fourier transform back.

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Schrodinger's equation in an infinite potential well

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Fourier transform Schrodinger's equation, solve the resulting ODE with given potential, and apply boundary conditions after inverse Fourier transforming.

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Burgers' equation with viscosity

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Apply the Fourier transform to Burgers' equation, employ the Cole-Hopf transformation to linearize, solve the ODE, then invert to real space.

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