The interpolation problem of the Hcurl space between different grids

[DSTxj]

In Firedrake, is it possible to directly interpolate functions in the Hcurl space on different meshes? When I directly use the command "interpolate", an error will occur.

[dham]

Not quite yet. It's this PR if you want to keep track of progress: #4804

For the moment you have to interpolate into a spanning DG space on the target mesh and then interpolate down if required.