[Commits] [svn:einsteintoolkit] incoming/Symmetry/ParitySymmetry/ (Rev. 92)

[yosef at astro.rit.edu]

User: zlochower
Date: 2013/07/01 12:31 PM

Modified:
 /Symmetry/ParitySymmetry/
  README
 /Symmetry/ParitySymmetry/test/
  KerrSchild-parity.par

Log:
 Describe the thorn and give correct title to test

File Changes:

Directory: /Symmetry/ParitySymmetry/
====================================

File [modified]: README
Delta lines: +12 -10
===================================================================
--- Symmetry/ParitySymmetry/README	2013-06-23 02:29:19 UTC (rev 91)
+++ Symmetry/ParitySymmetry/README	2013-07-01 17:31:01 UTC (rev 92)
@@ -1,4 +1,4 @@
-Cactus Code Thorn RotatingSymmetry180
+Cactus Code Thorn ParitySymmetry
 Author(s)    : Erik Schnetter <schnetter at cct.lsu.edu>
 Maintainer(s): Erik Schnetter <schnetter at cct.lsu.edu>
 Licence      : GPL
@@ -6,17 +6,19 @@
 
 1. Purpose
 
-Provide a 180 degree rotational symmetry boundary condition.  This is
-the kind of symmetry that exists e.g. in a binary black hole evolution
-when the two black holes are identical.  The same setup also admits an
-additional bitant symmetry.
+Provides parity symmetry boundary condition. That is, there is a
+symmetry (only) under simulatneous reflections about all coordinate
+directions: (x,y,z) -> (-x, -y, -z).  This is a the kind of
+symmetry that exists e.g. in certain binary black hole evolution when
+the momentum of the  two black holes are equal in magnitude and
+opposite in direction, the spins are equal in magnitude and direction,
+and the masses are identical.
 
-Currently the symmetry is fixed to be located at the lower x boundary,
-so that there is a rotation about the z axis.
+Currently the symmetry is fixed to be located at the lower z boundary.
 
 The coordinate thorn does not know about this symmetry.  You will have
-to set up the domain such that you have an upper bitant in the x
+to set up the domain such that you have an upper bitant in the z
 direction.
 
-This symmetry boundary condition can be mixed with arbitrary symmetry
-conditions in the z direction, e.g. bitant or periodicity.
+This symmetry boundary condition should not be mixed with other symmetry
+conditions.

Directory: /Symmetry/ParitySymmetry/test/
=========================================

File [modified]: KerrSchild-parity.par
Delta lines: +1 -1
===================================================================
--- Symmetry/ParitySymmetry/test/KerrSchild-parity.par	2013-06-23 02:29:19 UTC (rev 91)
+++ Symmetry/ParitySymmetry/test/KerrSchild-parity.par	2013-07-01 17:31:01 UTC (rev 92)
@@ -1,4 +1,4 @@
-Cactus::cctk_run_title = "Kerr-Schild with a 180 degree rotational symmetry"
+Cactus::cctk_run_title = "Kerr-Schild with parity symmetry"
 
 Cactus::cctk_full_warnings         = yes
 Cactus::highlight_warning_messages = no