# vinculum

## 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: $$0.\overline {142857}$$
• Radicand of a radical: $$3\sqrt{742} + 3$$
• Notation of a segment with endpoints A and B: $$\overline {\textrm{AB}}$$
• Rational expression: $$\dfrac {3x^{2}} {5x^{2}+2x-1}$$