Harmonic functions, defined as twice continuously differentiable functions satisfying Laplace’s equation, have long been a subject of intense study in both pure and applied mathematics.

Two phrases are commonly encountered in discussions of harmonic distortion. One is total harmonic distortion (THD), and the other is distortion factor (DF). The definition of the first phrase is ...

To find different terms in the Fourier expansion of a function, one uses different discs in the machine. These are stored in a separate case that has catalog number 323827. Documentation that ...