A surface harmonic of degree 
which is premultiplied by a factor 
. Confusingly, solid harmonics are also known as "spherical
harmonics" (Whittaker and Watson 1990, p. 392).
Solid Harmonic
See also
Spherical Harmonic, Surface HarmonicExplore with Wolfram|Alpha
References
Byerly, W. E. An Elementary Treatise on Fourier's Series, and Spherical, Cylindrical, and Ellipsoidal Harmonics, with Applications to Problems in Mathematical Physics. New York: Dover, p. 198, 1959.Whittaker, E. T. and Watson, G. N. A Course in Modern Analysis, 4th ed. Cambridge, England: Cambridge University Press, 1990.Referenced on Wolfram|Alpha
Solid HarmonicCite this as:
Weisstein, Eric W. "Solid Harmonic." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SolidHarmonic.html