A macron is a bar placed over a single symbol or character, such as x^_. The symbol z^_ is sometimes used to denote the following operations:

1. The complex conjugate z^_.

2. The mean x^_ (a.k.a. arithmetic mean) of a set of values {x_i}_(i=1)^N.

3. Negation of a logical expression.

4. Infrequently, the adjoint operator.

A bar placed over multiple symbols or characters is called a vinculum.

See also

Adjoint, Arithmetic Mean, Bar, Complex Conjugate, Hat, Mean, Vinculum

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Bringhurst, R. The Elements of Typographic Style, 2nd ed. Point Roberts, WA: Hartley and Marks, p. 281, 1997.

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Cite this as:

Weisstein, Eric W. "Macron." From MathWorld--A Wolfram Web Resource.

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