[ET Trac] [Einstein Toolkit] #713: Implement "Conformal Covariant Z4" formulation in McLachlan

[Einstein Toolkit]

#713: Implement "Conformal Covariant Z4" formulation in McLachlan
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 Reporter:  barry.wardell          |       Owner:     
     Type:  enhancement            |      Status:  new
 Priority:  major                  |   Milestone:     
Component:  EinsteinToolkit thorn  |     Version:     
 Keywords:                         |  
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 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:

 1. Create a separate Kranc script for the CCZ4 system. This has the
 advantage of keeping the existing code tidier and easier to read.
 2. 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.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/713>
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