Hi, I’m trying to impose a global constraint using a Lagrange multiplier on dolfinx. I have created a minimal example to test the constraint, however, I’m receiving a different result compared with dolfin. [aaa] Here is a minimal working example (dolfin): from dolfin import * # Create mesh mes…

Applying a constraint using a Lagrange multiplier dolfinx

mscroggs July 11, 2022, 10:04am 4

Good news: @jackhale has been working on Real spaces and there’s a now a PR open that adds support for them to DOLFINx (Add Real Space by jhale · Pull Request #2266 · FEniCS/dolfinx · GitHub)

4 Likes

Initialization of function on Real element

Topic		Replies	Views
How to apply Lagrange multiplier constraint dolfinx? General	5	1393	April 3, 2024
Constrains using null space in dolfinx dolfinx	10	1003	January 17, 2024
Implementing custom newton solver with Lagrange multiplier dolfinx mpi	0	83	September 15, 2024
Newton Solver Convergence of a non linear problem for a mixed formulation Lagrange multiplier in 1d General boundary-conditions , dolfinx	4	74	May 12, 2025
DOLFIN error in FEM with lagrange multiplier problem General	1	266	April 29, 2023