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Sigma KEE - Number

KB Term:

Number

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.

Relationships
Parents	Quantity	Any specification of how many or how much of something there is. Accordingly, there are two subclasses of Quantity: Number (how many) and PhysicalQuantity (how much).
Children	ComplexNumber	A Number that has the form: x + yi, where x and y are RealNumbers and i is the square root of -1.
	ImaginaryNumber	Any Number that is the result of multiplying a RealNumber by the square root of -1.
	MultipoleVariable	a variable that describes energetical interactions between multipoles.
	RealNumber	Any Number that can be expressed as a (possibly infinite) decimal, i.e. any Number that has a position on the number line.