(mathematics) A function of two, three or n variables which is a solution to any of Laplace's equations

plural of harmonica

plural of harmonicon

(mathematics) The solutions to Laplace's equation using spherical coordinates

someone who plays a harmonica

plural of harmonic

(physics, music) The science of musical sounds

plural of harmonicist

(mathematical analysis) A study of the representation of functions or signals as the superposition of basic waves, involving the notions of harmonic functions, trigonometric series, Fourier series, Fourier transforms, almost periodic functions, and others.

In a harmonic manner.