conatus.expert.EquatorialParity¶

conatus.expert.EquatorialParity(coordsys)[source]¶

Equatorial reflection z -> -z (theta -> pi - theta) of S2 or spherical coordinates: the parity (-1)^(l+m) of Y_l^m (spin components: u_+ <-> -u_-). Returns Reflection(theta, about=pi/2); accepts the coordinate system or one of its coordinates.