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Imaginary Number
(redirected from I number)

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imaginary number: see number number, entity describing the magnitude or position of a mathematical object or extensions of these concepts. The Natural Numbers


Cardinal numbers describe the size of a collection of objects; two such collections have the same (cardinal) number of
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.

imaginary number

Any number of the form bi where b is a real number, i is the square root of −1, and b is not zero. See also complex number.


imaginary number [ə′maj·ə‚ner·ē ′nəm·bər]
(mathematics)
A complex number of the forma+bi, withbnot equal to zero, whereaandbare real numbers, andi= √(-1); some mathematicians require also thata= 0. Also known as imaginary quantity.

Imaginary Number 

a number of the form x + iy, where i = Imaginary Numberx and y are real numbers and y ≠ 0; that is, a complex number that is not real. Imaginary numbers of the form iy are called pure imaginary; sometimes only the latter are referred to as imaginary numbers. The term “imaginary number” appeared after such numbers had already entered general use although their real meaning had not been ascertained.



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