Mathematica > Mathematics and Algorithms > Formula Manipulation > Assumptions and Domains > Reals
BUILT-IN MATHEMATICA SYMBOL

Reals

Reals
represents the domain of real numbers, as in .

DetailsDetails

  • evaluates immediately only if x is a numeric quantity.
  • Simplify[exprReals] 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 .

ExamplesExamplesopen allclose all

Basic Examples (3)Basic Examples (3)

is a real number:

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If is a real number, so is :

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Find real solutions of an equation:

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Scope (4)Scope (4)

Properties & Relations (3)Properties & Relations (3)

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