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Question on boundary integral for interface of a two-domain problem

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6 years 2 months ago #389 by Guosheng Fu
Question on boundary integral for interface of a two-domain problem was created by Guosheng Fu
I am using DG for a two-domain problem.
The domain is a small square inclosed in a large square.

The question is when I do symbolic integration
a += symbolicBFI(u*v, VOL, skeleton=True)
does this skeleton integrator include the integration on the interface of the two domains?
It seems I can integrate on the interface boundary as follows:
a += symbolicBFI(u*v, skeleton=True, definedon=mesh.Boundaries("interface_id"))

I am quite confused....
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