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FilledSmallSquareReals represents the domain of real numbers, as in x Reals.

FilledSmallSquarex Reals evaluates immediately only if x is a numeric quantity.

FilledSmallSquareSimplify[expr Reals] can be used to try to determine whether an expression corresponds to a real number.

FilledSmallSquare Within Simplify and similar functions, objects that satisfy inequalities are always assumed to be real.

FilledSmallSquareReals is output in TraditionalForm as .

FilledSmallSquare See The Mathematica Book: Section 1.4.6 and Section 3.3.10.

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

Further Examples