It can. It does that in essentially the same way as we do for
vector-valued problems (see step-20, step-22, ...). There are
corresponding extractors for symmetric and non-symmetric tensors, and
you can also output tensor-valued quantities for visualization.
Best
W.
--
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Wolfgang Bangerth email:
bang...@colostate.edu
www:
http://www.math.colostate.edu/~bangerth/