Therefore, any wave front can be synthesized from such elementary waves.

A new edition was published as Elementary Wave Mechanics in 1945.

This is a result of having a finite number of transducers (and hence elementary waves).

These notes were the basis for Heitler's book Elementary Wave Mechanics: Introductory Course of Lectures, first published in 1943.

More generally, the asymptotic analysis and stability of the plethora of elementary waves and patterns supported by the various model equations present a number of challenging open mathematical problems.

A further revised version appeared as Elementary Wave Mechanics With Applications to Quantum Chemistry in 1956, as well as in German in 1961.

Because the resulting wavefront is a composite of elementary waves, a sudden change of pressure can occur if no further speakers deliver elementary waves where the speaker row ends.

Walter Heitler Elementary Wave Mechanics: Introductory Course of Lectures Notes taken and prepared by W.S.E. Hickson (Oxford, 1943)

The problem of determining the error locations has therefore been reduced to the problem of finding, given a sequence of values, the smallest set of elementary waves into which these values can be decomposed.