Roy Stogner wrote: > Block variable ordering with "--node_major_dofs" is perhaps the least > well-documented option in libMesh, which is saying a lot, but we're > already using it.
Neat. > We'll have to construct the true Jacobian for the adjoint problem, but > might try to set up a preconditioner based on reduced physics or a > coarser grid. You still don't need to assemble the adjoint, you just need to be able to multiply with the adjoint. Finite differencing can't do this for you, but AD can and it's easy to do yourself when you have a Galerkin method (basically just swap test and trial functions in the right place). Jed
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