On 6/18/25 08:57, Léonhard YU wrote:
sorry for the second message on the same day. I need interpolate the
Jacobian matrix of at the center of an element. I wrote the following part but
I am not sure whether it is right (because this is my first time to use
FE_nothing)
This looks right to me, though of course I haven't tested it. The way you
convince yourself that it's right is that you apply this to cells for which
you know what the Jacobian should be -- say, for a mesh of squares, a mesh of
rectangles, or something that is rotated. In those cases, you can compute the
Jacobian on a piece of paper and compare with what your code gives.
Best
W.
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