<Li> ((\ displaystyle \ () addresses on Pine Street) (\ displaystyle \)) is the set of all addresses on Pine Street . </Li> <P> However, the prose approach may lack accuracy or be ambiguous . Thus, set builder notation is often used with a predicate characterizing the elements of the set being defined, as described in the following section . </P> <P> Set builder notation can be used to describe sets that are defined by a predicate, rather than explicitly enumerated . In this form, set builder notation has three parts: a variable, a colon or vertical bar separator, and a logical predicate . Thus there is a variable on the left of the separator, and a rule on the right of it . These three parts are contained in curly brackets: </P> <Dl> <Dd> (x ∣ Φ (x)) (\ displaystyle \ (x \ mid \ Phi (x) \)) </Dd> </Dl>

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