[Tex/LaTex] How to add \= (“macron”, “overbar”) in an equation?


I am trying the following code


But it's some errors. I think the error might be because I cannot use macron in math environment. how can I resolve this?

Best Answer

In general text accent commands uses symbol names: \= for macron \" for umlaut etc, and math accents (which are logically quite distinct) use words so \bar for an over bar accent, and \ddot for a double dot accent, etc. In the case of the bar sometimes \overline works better (that is not built using the math accent primitives, but is simply a rule drawn over the expression, but unlike \bar which is a fixed character from the font, \overline extends as needed to cover the expression.

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