#949: RotatingSymmetry90: abort when evaluating tensor type for Weyl scalars ------------------------------------+--------------------------------------- Reporter: bmundim | Owner: Type: defect | Status: closed Priority: major | Milestone: Component: EinsteinToolkit thorn | Version: Resolution: invalid | Keywords: RotatingSymmetry90 Weyl scalars ------------------------------------+---------------------------------------
Comment (by hinder):
The manual Cartesian parities specify the sign changes of the function under ''reflections'' in the planes perpendicular to the axes. These can therefore be used directly by ReflectonSymmetry. With RotatingSymmetry180, the symmetry operation is fortuitously equivalent to a reflection in the x direction composed with a reflection in the y direction, so if you know how a function transforms under reflections in the axes, you can determine how it transforms under the 180 degree rotation. RotatingSymmetry180 contains the logic to apply the parities that have been chosen. However, I don't think that a 90 degree rotation can be written as a composition of reflections, so the manual Cartesian parities are not useful here. In any case, RotatingSymmetry90 does not take account of these parities.