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 .

• See Section 1.4.6, Section 3.3.11 and Section 3.4.9.

• See also: Element, Simplify, Real, Integers, Complexes, Algebraics, ComplexExpand, PowerExpand.

• New in Version 4.