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.


  • 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: \(\dfrac {3x^{2}} {5x^{2}+2x-1}\)

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