Vinculum
Latin word meaning link or chain. In general, when writing a numerical expression of mathematics, the vinculum is a sign used in various contexts to graphically relate symbols (digits or letters) that must be considered to form a whole.
Examples
- Period of a fraction: [latex]0.\overline {142857}[/latex]
- Radicand of a radical: [latex]3\sqrt{742} + 3[/latex]
- Notation of a segment with endpoints A and B: [latex]\overline {\textrm{AB}}[/latex]
- Rational expression: [latex]\dfrac {3x^{2}} {5x^{2}+2x-1}[/latex]