I want to implement the LDG with Fenics, does anybody implement it before ? For I can't deal with the "Lifting Operator" ! Thanks!
See this http://fenicsproject.org/qa/2502/local-discontinuous-galerkin-ldg-method?show=2502#q2502
I know this kind of methods! I want to implement it by lifting operator! Thank you all the same!
I find the answer of mine ,Please refer the link below:
http://repository.tudelft.nl/view/ir/uuid%3A9c703850-e7fd-457c-a94a-ce0c0af27c0d/
this article have solved the problem already!