Hi,
I noticed that WeylScal4 sets the symmetries of the Weyl scalars by defining the real and imaginary parts of each of the psi's in a different group. RotatingSymmetry and the ReflectionSymmetry thorns define a tensor alias "weylscalars_real", but the symmetries given there do not correspond to those of the psi's.
The Weyl symmetries as provided in RotatingSymmetry180
static int const weylparities[10][3] = {{+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}};
The symmetries for rpsi0, ipsi0, rpsi1, ipsi1, ..., rpsi4, ipsi4
static int const weylparities[10][3] = {{+1,+1,+1}, /* rpsi0 */ {-1,-1,-1}, /* ipsi0 */ {+1,+1,-1}, /* rpsi1 */ {-1,-1,+1}, /* ipsi1 */ {+1,+1,+1}, /* rpsi2 */ {-1,-1,-1}, /* ipsi2 */ {+1,+1,-1}, /* rpsi3 */ {-1,-1,+1}, /* ipsi3 */ {+1,+1,+1}, /* rpsi4 */ {-1,-1,-1}}; /* ipsi4 */
Hi Yosef,
I'm not so familiar with the parities in the symmetry thorns, but I am reasonably confident that the manual Cartesian parities which are set by WeylScal4 are correct (in fact, there was correction committed just a few days ago). So, it seems likely that the parities in the symmetry thorns are either wrong or my interpretation of what they mean is wrong.
Can someone who is familiar with the symmetry thorns comment on whether the code there is correct? Are these parities used by any actively used code? It looks like they were added for PsiKadelia.
Barry
On Fri, May 18, 2012 at 4:02 PM, Yosef Zlochower yosef@astro.rit.eduwrote:
Hi,
I noticed that WeylScal4 sets the symmetries of the Weyl scalars by defining the real and imaginary parts of each of the psi's in a different group. RotatingSymmetry and the ReflectionSymmetry thorns define a tensor alias "weylscalars_real", but the symmetries given there do not correspond to those of the psi's.
The Weyl symmetries as provided in RotatingSymmetry180
static int const weylparities[10][3] = {{+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}};
The symmetries for rpsi0, ipsi0, rpsi1, ipsi1, ..., rpsi4, ipsi4
static int const weylparities[10][3] = {{+1,+1,+1}, /* rpsi0 */ {-1,-1,-1}, /* ipsi0 */ {+1,+1,-1}, /* rpsi1 */ {-1,-1,+1}, /* ipsi1 */ {+1,+1,+1}, /* rpsi2 */ {-1,-1,-1}, /* ipsi2 */ {+1,+1,-1}, /* rpsi3 */ {-1,-1,+1}, /* ipsi3 */ {+1,+1,+1}, /* rpsi4 */ {-1,-1,-1}}; /* ipsi4 */
-- Dr. Yosef Zlochower Center for Computational Relativity and Gravitation Assistant Professor School of Mathematical Sciences Rochester Institute of Technology 85 Lomb Memorial Drive Rochester, NY 14623
Office:74-2067 Phone: +1 585-475-6103
yosef@astro.rit.edu
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On 05/18/2012 03:48 PM, Barry Wardell wrote:
Hi Yosef,
I'm not so familiar with the parities in the symmetry thorns, but I am reasonably confident that the manual Cartesian parities which are set by WeylScal4 are correct (in fact, there was correction committed just a few days ago).
The symmetries for WeylScal4 match the expected symmetries of the Weyl scalars.
So, it seems likely that the parities in the symmetry thorns are either wrong or my interpretation of what they mean is wrong.
Can someone who is familiar with the symmetry thorns comment on whether the code there is correct? Are these parities used by any actively used code? It looks like they were added for PsiKadelia.
I have an old version of PsiKadelia, and the symmetries there seem to be set incorrectly.
Barry
On Fri, May 18, 2012 at 4:02 PM, Yosef Zlochower <yosef@astro.rit.edu mailto:yosef@astro.rit.edu> wrote:
Hi, I noticed that WeylScal4 sets the symmetries of the Weyl scalars by defining the real and imaginary parts of each of the psi's in a different group. RotatingSymmetry and the ReflectionSymmetry thorns define a tensor alias "weylscalars_real", but the symmetries given there do not correspond to those of the psi's. The Weyl symmetries as provided in RotatingSymmetry180 static int const weylparities[10][3] = {{+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}, {+1,+1,+1}, {-1,-1,-1}}; The symmetries for rpsi0, ipsi0, rpsi1, ipsi1, ..., rpsi4, ipsi4 static int const weylparities[10][3] = {{+1,+1,+1}, /* rpsi0 */ {-1,-1,-1}, /* ipsi0 */ {+1,+1,-1}, /* rpsi1 */ {-1,-1,+1}, /* ipsi1 */ {+1,+1,+1}, /* rpsi2 */ {-1,-1,-1}, /* ipsi2 */ {+1,+1,-1}, /* rpsi3 */ {-1,-1,+1}, /* ipsi3 */ {+1,+1,+1}, /* rpsi4 */ {-1,-1,-1}}; /* ipsi4 */ -- Dr. Yosef Zlochower Center for Computational Relativity and Gravitation Assistant Professor School of Mathematical Sciences Rochester Institute of Technology 85 Lomb Memorial Drive Rochester, NY 14623 Office:74-2067 Phone: +1 585-475-6103 <tel:%2B1%20585-475-6103> yosef@astro.rit.edu <mailto:yosef@astro.rit.edu> CONFIDENTIALITY NOTE: The information transmitted, including attachments, is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and destroy any copies of this information. _______________________________________________ Users mailing list Users@einsteintoolkit.org <mailto:Users@einsteintoolkit.org> http://lists.einsteintoolkit.org/mailman/listinfo/users
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