Hi, @Matt-This is exactly what I wanted to do. Thank you for the help. Mapping for both directions (Q0->Q1 and Q1->Q0) works well. @Lawrence-Thank you for the comment. So far, Matt's comment fits my purpose.
Thanks, > > > > I am not sure Injection is going to "do the right thing" when you move > between spaces. At least my memory of the implementation > > was that it just did local interpolation, which is not right when > injecting P0 into P1. > > Ah, that could be the case. For discontinuous things I think what you > want is the L2 projection of the fine function into the coarse space > (which on nested meshes you can compute locally), this is what I > implemented in Firedrake IIRC. > > I agree that point interpolating won't work, and I guess in that case > some kind of scaling of a dual thing is approximating the L2 > projection. > > Lawrence >
