[petsc-users] Modified Taylor-Hood elements with piece-wise constant pressure for Stokes equation

[Jed Brown]

Lawrence Mitchell <lawrence.mitchell at imperial.ac.uk> writes:
> So-called "enriched" elements in FEniCS are not created with a nodal
> basis, instead te "basis" for the space Q + P is just the
> concatenation of the bases for Q and P separately and so tabulation of
> basis functions at points is just the concatentation of the tabulation
> of Q and that of P.

So the mass matrix for CG1+DG0 is singular?
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