complex variable

American  

noun

Mathematics.

1. a variable to which complex numbers may be assigned as value.

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Etymology

Origin of complex variable

First recorded in 1875–80

Example Sentences

The variation in healthy hearts produced a very complex, variable melody line.

From Newsweek

Consider the polynomial z2, where is the complex variable x+iy.

From Scientific American

Of this enormously powerful relation, a more lately discovered result, which is very fundamental in the theory of functions of a complex variable, and which is generally quoted as Riemann's theorem, is only a particular case.

From Project Gutenberg

It will be seen that as each successive aspect of geographical science is considered in its natural sequence the conditions become 638 Conclusion. more numerous, complex, variable and practically important.

From Project Gutenberg

Application of Cauchy’s Theorem to the Determination of Definite Integrals.—Some reference must be made to a method whereby real definite integrals may frequently be evaluated by use of the theorem of the vanishing of the integral of a function of a complex variable round a contour within which the function is single valued and non singular.

From Project Gutenberg