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2. Template talk:Real numbers - Wikipedia

   en.wikipedia.org/wiki/Template_talk:Real_numbers

   Template talk: Real numbers. ... Download as PDF; Printable version; Numbers: This template is within the scope of ...

3. Glossary of mathematical symbols - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_mathematical...

   A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...

4. Mathematical notation - Wikipedia

   en.wikipedia.org/wiki/Mathematical_notation

   Mathematical notation consists of using symbols for representing operations, unspecified numbers, relations, and any other mathematical objects and assembling them into expressions and formulas. Mathematical notation is widely used in mathematics , science , and engineering for representing complex concepts and properties in a concise ...

5. Real number - Wikipedia

   en.wikipedia.org/wiki/Real_number

   The long real line pastes together ℵ 1 * + ℵ 1 copies of the real line plus a single point (here ℵ 1 * denotes the reversed ordering of ℵ 1) to create an ordered set that is "locally" identical to the real numbers, but somehow longer; for instance, there is an order-preserving embedding of ℵ 1 in the long real line but not in the real ...

6. Sign (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Sign_(mathematics)

   The plus and minus symbols are used to show the sign of a number. In mathematics, the sign of a real number is its property of being either positive, negative, or 0.Depending on local conventions, zero may be considered as having its own unique sign, having no sign, or having both positive and negative sign.

7. Table of mathematical symbols by introduction date - Wikipedia

   en.wikipedia.org/wiki/Table_of_mathematical...

   Download as PDF; Printable version; In other projects ... See History of algebra: The symbol x. 1637 [2] René Descartes ... (for integer numbers set)

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9. List of types of numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_types_of_numbers

   Computable number: A real number whose digits can be computed by some algorithm. Period: A number which can be computed as the integral of some algebraic function over an algebraic domain. Definable number: A real number that can be defined uniquely using a first-order formula with one free variable in the language of set theory.