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Sigma KEE - RealNumber

実数

（無限の可能性がある）10進数として表現できる任意の Number。例：数直線の位置を持つ任意の Number。

Relationships
Parents	数	A measure of how many things there are, or how much there is, of a certain kind. Numbers are subclassed into RealNumber, ComplexNumber, and ImaginaryNumber.
Children	2進数	Elements from the number system with base 2. Every BinaryNumber is expressed as a sequence of the digits 1 and 0.
	無理数	Any RealNumber that is not also a RationalNumber.
	負の実数	A RealNumber that is less than zero.
	非負実数	A RealNumber that is greater than or equal to zero.
	有理数	Any RealNumber that is the product of dividing two Integers.