Dolfin-adjoint in dolfinx

dolfinx
1

Please could you let me know if it is possible to compute the sensitivity of functionals within dolfinx in a similar manner as within dolfin-adjoint?

Many thanks

2

I don’t think dolfin adjoint supports dolfinx (yet). However depending on what you are trying to do, simply using ufl to define expressions of the sensitivities might be enough.

3

Thanks for the reply Calva.

Is there an equivalent of compute_gradient(J, Control()) in ufl? Or do you mean deriving and solving the adjoint equation manually?

4

You would have to derive it yourself. What I think @Calva means is that for quite alot of problems, consisting of only one PDE, deriving the adjoint equation is quite straightforward using ufl.derivative

5

Thanks Dokken.

Do you have an estimate for the release of dolfin-adjoint for dolfinx?

6

I do not. dolfin-adjoint is an independent project, initially created by Patrick E. Farrell, David A. Ham, Simon W. Funke and Marie E. Rognes and its newer version mainly created by @sebastkm.

It depends on what research grants one can get for redeveloping the software for DOLFINx, and who is willing to participate in this.

7

Thanks Dokken - this makes sense. I hope it is redeveloped for DOLFINx, it is a fantastic package.

8

Does anyone know if there’s been any progress towards dolfin-adjoint supporting DOLFINx?

9

I’m currently writing up a proposal for this. Let’s hope it gets funded.

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10

Oh that’s fantastic news! Good man!! And best of luck.