NGSTrefftz provides a framework to implement Trefftz finite element spaces for , with several Trefftz spaces already implemented. Additionally, Trefftz-DG on tent-pitched meshes for the acoustic wave equation is implemented using meshes provided by . Furthermore, the package includes an implementation of the embedded Trefftz method.

You can try out some jupyter notebooks:

• Launch the Binder here:
  
• Or run the docker locally (you need to have docker installed):

git clone https://github.com/PaulSt/NGSTrefftz
cd NGSTrefftz && docker build -t ngstrefftz_jupyter .
docker run -p 8888:8888 ngstrefftz_jupyter

You need to have installed. Then you can either:

• install using pip

pip install ngstrefftz

• or build from source

git clone --recursive https://github.com/PaulSt/NGSTrefftz
mkdir ./NGSTrefftz/make && cd ./NGSTrefftz/make
cmake ../src && make install

• Tent pitching and Trefftz-DG method for the acoustic wave equation
  
• A space-time quasi-Trefftz DG method for the wave equation with piecewise-smooth coefficients
  
• Embedded Trefftz discontinuous Galerkin methods