[Carpetx-developers] Weekly call at 4:00PM Eastern

[Roland Haas]

present: Steve, Roland, Lucas, Allen, Cheng-Hsin, Liwei

hybrid evolution methods and RK4Prol methods
============================================

* Lucas has tried the RKAB method but finds that time level support in
  CarpetX does not easily support these, shelved for now
* Lucas is now comparing his standalone method with Liwei's and finds
  that, assuming identical initial data, one gets the same results
* now testing implementations with high frequency noise (stability
  test, Neuman analysis)

CapyrX
======

* Lucas can now evolve Gaussian and standing wave in fully first order
  formulation with all FD operations successfully (no more shearing
  effects)
* expansion of pulse into curvilinear grid shows no artifacts at
  interpatch
* sees some issues in Cartesian grid, might be boundary conditions not
  quite right
* issue was either projection of or jac derivatives
* has tried to run on CPU gut is encountering issues, postpone until
  Erik can make it

tabulated EOS
=============

* Allen is working on tabulated EOS and is looking for a TOV reader
  that can use LORENE formatted EOS tables
* no proposal were made during the call

NewRadX
=======

* Liwei updated pull request to main
* added a test case that shows the failing behaviour in TestNewRadX
* Lucas has reviewed CarpetX pull request, has some minor comments

ReadinterpolateX
================

* Liwei is continuing porting Lorenzo's version to CarpetX

Subcycling in time
==================

* Liwei is continuing to debug BBH simulation on main branch, looking
  for memory leaks

Derivs thorn
============

* Liwei added higher derivative operators

Yours,
Roland

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