Hi! Is there any demo/sandbox with a problem involving higher-order derivatives?
I'm trying to solve some 4th order equations but with no successful solutions until know. (This is, 2nd and/or 3th order derivatives in the variational forms.) What should be the syntax for the higher order derivatives in the ufl file? I'm using div grad compositions, for instance, div(grad(u)) for the laplacian of u. Everything compiles fine, Thanks. -- Nuno David Lopes e-mail:n...@ptmat.fc.ul.pt (FCUL/CMAF) nlo...@dec.isel.ipl.pt (ISEL) http://ptmat.ptmat.fc.ul.pt/%7Endl/ Thu Jun 25 10:49:51 WEST 2009
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