Hi all,
I have 2 questions of computing convergence rate of L2 norm of error:
1. If I don't have exact solution, does deal.ii have functions to compute
convergence rate directly? (Like VectorTools::integrate_difference, which
deals with the problem with exact solution )
2. If I want to compute convergence rate of error of solutions with
different globally refinement (u_{h}-u_{h/2}, u_{h/2}-u_{h/4}, and so on ),
does deal.ii have functions to compute convergence rate directly?
if not, how to deal with computing u_{h}-u_{h/2}, where the 2 numerical
solution have different size of vector?
Thanks in advance!
Best,
Chucui
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