Discrete Laplacian
= Discrete Laplacian
{title2=$\Delta_h$}
A finite-dimensional approximation of the <Laplacian>. On a periodic one-dimensional grid the centered operator has Fourier eigenvalue $-4\sin^2(\theta/2)/h^2$ and a constant nullspace.
= Discrete Laplacian
{title2=$\Delta_h$}
A finite-dimensional approximation of the <Laplacian>. On a periodic one-dimensional grid the centered operator has Fourier eigenvalue $-4\sin^2(\theta/2)/h^2$ and a constant nullspace.