The [http://arxiv.org/abs/1106.2254 conformal covariant Z4] formulation is a variant of the Z4 system which can be implemented as a modification to existing BSSN codes through the addition of some terms and a single evolved grid function. Dana Alic implemented and tested this in McLachlan. I have created a "CCZ4" branch and committed her work, then merged some recent changes which were committed to the master branch since the version she based her code off of. It would be nice to merge this branch back into master, but I am unsure how to proceed. Two options are:
- Create a separate Kranc script for the CCZ4 system. This has the advantage of keeping the existing code tidier and easier to read.
- Keep a single Kranc script and add a parameter to select which formulation to use. This may make it easier to maintain both versions as there is a very large overlap between the two.