Skip to main content

ExaGRyPE

ExaGRyPE: Numerical General Relativity Solvers Based upon the Hyperbolic PDEs Solver Engine ExaHyPE

ExaGrYPE is an extension to ExaHyPE 2 which in turn is built on top of Peano 4. Peano provides the AMR meshing (as well as all other facilities that we need such as the data management, MPI and multithreading), ExaHyPE 2 provides all the hyperbolic solver tools on top of this, and ExaGRyPE finally tweaks and tailors these generic solvers towards numerical relativity.

The code is introduced in a paper in Computer Physics Communications

@article{Zhang:2025:ExaGRyPE,
title = {ExaGRyPE: Numerical general relativity solvers based upon the hyperbolic PDEs solver engine ExaHyPE},
journal = {Computer Physics Communications},
volume = {307},
pages = {109435},
year = {2025},
issn = {0010-4655},
doi = {https://doi.org/10.1016/j.cpc.2024.109435},
}

and the source code is now part of the the standard Peano 4 releases. If you download this code and add ExaHyPE as extension, you can directly reproduce all ExaGRyPE results and build your own ExaGRyPE applications. The code’s documentation holds tutorials and information on this.

@tobiasweinzierl.bsky.social

  • Had a lot of fun presenting our #ExCALIBUR multigrid work at IMG at KAUST. Looking forward to publish the ideas around DG soon.
  • We've just received notice that the paper of our former @miscada.bsky.social student Timothy Stokes has made it into the finals of the 10th BGCE Prize @ SIAM CSE25. Looking forward to meet you in Forth Worth and fingers crossed ...
  • Enjoyed to serve on the first panel at the DRI retreat in Manchester. Great questions. But also had a hard time: look at the microphone in front of me.
  • It was great to be in Durham Cathedral today and see my PhD student graduate. Once again: Congratulations Dr Noble.
  • Took me and two kids an afternoon to build this fake lego set. But eventually we did succeed. Peano, ExaHyPE, ... all are hosted on LRZ's gitlab and free to download.