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Examples of its use include the case of a group of infinitely repeating digits, for example,
It is also used in the notation of a radical to indicate the radicand whose root is being indicated. In the case of
the quantity is the radicand, and thus has a vinculum over it.
The vinculum is also sometimes used in Boolean algebra, where it serves to indicate a group of expressions whose logical result is to be NOTed, as in