On 8/26/24 06:35, Junxiang Wang wrote:
However, In all the tutorials steps of deal.II , the test function is
indexed by "i" loop, right? For example, in the form of local_matrix(
i, j ).
The difference is whether you multiply the equation from the left, or
from the right, by a test function to obtain the weak formulation. In
the tutorials, we always multiply from the left. Thomas may be
multiplying from the right. There is some discussion on the matter in
the introduction to step-9:
https://www.dealii.org/current/doxygen/deal.II/step_9.html
Best
W.
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