Great, and keep it on the list. Lots of people here to help! On Wed, Feb 11, 2026 at 9:46 AM Matteo Leone <[email protected]> wrote:

Wow thank you so much! I was almost hopeless, I'll deep dive into it and I'll give you a feedback.

Matteo

------------------------------ *From:* Mark Adams <[email protected]> *Sent:* Wednesday, February 11, 2026 3:38:30 PM *To:* Matteo Leone <[email protected]> *Cc:* [email protected] <[email protected]> *Subject:* Re: [petsc-users] DG methods in PETSc

DG (discontinuous Galerkin) is done with a "Broken" FE. Yikes I do not see a test. Here is a test but it is not well verified. Mark

On Tue, Feb 10, 2026 at 10:25 AM Matteo Leone via petsc-users < [email protected]> wrote:

Hello, I already posted on Reddit but just to be sure I write even here.

First thanks for the job you do for PETSc, I have used it for several projects and is always nice.

I am writing cause I am getting mad trying to implement DG solver in PETSc, the target is the Euler equations, however I am failing even with just the simplest transport equation (u/t + u/x = 0). I was wondering if I am missing somenthing. I tried with the DSSetReimannSolver and DualSpaces, and more, but I keep failing, I tried also with LLMs, but seems like there is no DG code with PETSc on the web, however I see many papers that do it.

I was wondering if I am maybe missing something out or what.

For reference I use PETSc 3.24.3 by means of nix.

Thanks in advance, cheers.

Matteo