Hi all, is there a standard way to incorporate a product of two integrals over a 1D boundary into the weak formulation? One integral contains the unknown being solved for and the other contains a test function. For example, is it possible to have a term like the following in the weak form:
Naively trying to include this into the weak formulation causes an error and I’m wondering if there’s a standard method that I’m not aware of. Let me know if you require further information. Thanks!