A tensor defined in terms of the tensors which satisfy the double contraction relation.
Spherical Harmonic Tensor
See also
Double Contraction Relation, Spherical HarmonicExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Spherical Harmonic Tensor." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SphericalHarmonicTensor.html