Zonal spherical harmonics
SPHERICAL HARMONICS THAT ARE INVARIANT UNDER THE ROTATION THROUGH A PARTICULAR FIXED AXIS
Zonal spherical harmonic; Zonal harmonic; Zonal harmonics
In the mathematical study of rotational symmetry, the zonal spherical harmonics are special spherical harmonics that are invariant under the rotation through a particular fixed axis. The zonal spherical functions are a broad extension of the notion of zonal spherical harmonics to allow for a more general symmetry group.