represents the domain of real numbers, as in x∈Reals.
- x∈Reals evaluates immediately only if x is a numeric quantity.
- Simplify[expr∈Reals] can be used to try to determine whether an expression corresponds to a real number.
- Within Simplify and similar functions, objects that satisfy inequalities are always assumed to be real.
- Reals is output in TraditionalForm as .
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Introduced in 1999