[ET Trac] [Einstein Toolkit] #1759: need tensorparity=-1 for WeylScal4::curvIi_group and curvJi_group

[Einstein Toolkit]

#1759: need tensorparity=-1 for WeylScal4::curvIi_group and curvJi_group
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  Reporter:  physicsbeany@…          |       Owner:  Bernard Kelly      
      Type:  defect                  |      Status:  confirmed          
  Priority:  minor                   |   Milestone:  ET_2014_11         
 Component:  EinsteinToolkit thorn   |     Version:  development version
Resolution:                          |    Keywords:  weylscal4, parity  
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Changes (by hinder):

  * status:  new => confirmed


Comment:

 I have checked the parities for I and J, and agree with what
 "physicsbeany" suggests: i.e. curvIi and curvJi should be -1.  curvIr and
 curvJr remain as +1.  I have committed the corresponding change
 (https://bitbucket.org/einsteintoolkit/einsteinanalysis/commits/dbf613b8dd7c34c685e9ef9091c7608f146b9db4)
 and regenerated the code
 (https://bitbucket.org/einsteintoolkit/einsteinanalysis/commits/6eef88eef2e6dfb51d61e5b57e2f95ac814928ad).

 There are also invariants //J1–J4 "of the Narlikar and Karmarkar basis as
 defined in B5-B8 of arXiv:0704.1756. Computed from Weyl tensor expressions
 using xTensor."//  which I think Barry Wardell added.  Barry, do you know
 what the parities of these are supposed to be?  In my commit, I added a
 TODO for this.  I have computed the parities, and get +1 for all of them.
 Do you agree?  If so, I will add this explicitly in the code to eliminate
 the warning about assuming +1.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1759#comment:2>
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