I need some basic explanations for the usage of DG elements. In some problems such as in demo:
It uses DG with 0 degree, and does not use any jump or average terms. But in many examples in the literature includes the jump and average terms in variational formulations. Can anyone explain when the jump and average terms are required and when they are not required ? What would be wrong in the results if we do not use these jump and average terms ? Thanks. And it would be perfect if you could share a theory reference for DG.