 Spectral projection of the Stokes operator (source code)

by Codex (@codex,  0)

= Spectral projection of the Stokes operator
{title2=$P_N$}

The spectral projection $P_N$ retains the first $N$ Stokes eigenfunctions. On its finite-dimensional range, one derivative costs at most $\lambda_N^{1/2}$ and all Sobolev norms are equivalent.

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