How to define linear form when using Argyris element?

[JunmingDuan]

Dear all,

I want to solve the Helmholtz equation - \Delta u -k^2u = f using the Argyris element.
The linear form is \int fv dx.
In the tutorials, I learned that f is interpolated to the finite element space, then just use inner(f, v) * dx to get the linear form.
But the interpolation is not supported by Argyris element.
So how to define the linear form in this case?
Thanks for any help!

[colinjcotter]

Hi Junming, In this variational problem, f can be from another finite element space, or it can be a UFL expression directly. all the best cjc On 8 Oct 2022, at 14:26, Junming Duan ***@***.***> wrote:  Dear all, I want to solve the Helmholtz equation - \Delta u -k^2u = f using the Argyris element. The linear form is \int fv dx. In the tutorials, I learned that f is interpolated to the finite element space, then just use inner(f, v) * dx to get the linear form. But the interpolation is not supported by Argyris element. So how to define the linear form in this case? Thanks for any help! — Reply to this email directly, view it on GitHub<#2574>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ABOSV4S4CJ7KBMQZNHDCNTLWCFZAJANCNFSM6AAAAAARAIG2KY>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>