(mathematics) A type of measure of central tendency calculated as the reciprocal of the mean of the reciprocals, ie, H=n/1/x_1+1/x_2+⋯+1/x_n

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

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

(mathematics, mathematical analysis) The divergent series whose terms are the reciprocals of the positive integers; the series ∑ₙ₌₁ ᪲1/n.

plural of harmonic balancer

A device connected to the crankshaft of an engine to reduce torsional vibration and to serve as a pulley for drive belts.

plural of harmonic mean

plural of harmonic tremor

plural of harmonic analyzer

(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.