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Add Dirichlet condition. Symmetric, semi-definite matrix and MMS convergence working with variable coeff!
author Martin Almquist <malmquist@stanford.edu>
date Fri, 22 Dec 2017 14:16:17 +0100
parents f6ada1719420
children
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function u = ifour(u_hat)
    u_hat = ifftshift(u_hat);
    u = ifft(u_hat);
end