the mathematician invented imaginary number is rafael bombelli
http://wiki.answers.com/Q/Who_invented_imaginary_number...
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The Greeks were aware of the problem of square roots of negative numbers, but dismissed them as ridiculous and unworthy of discussion. Cardano (1501-1576) called them "fictitious". Bombelli (1526-1572) ran into them in his studies of cubic equations, but didn't know what to make of them.
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www.newton.dep.anl.gov/askasci/math99/math99232.htm
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Imaginary number - Wikipedia, the free encyclopedia
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An imaginary number , in mathematics, is a number in the form bi where b is a real number and i is the square root of minus one, known as the imaginary unit. Imaginary numbers and real numbers...
en.wikipedia.org/wiki/Imaginary_number
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Who invented imaginary numbers? ... Date: 03/09/2001 at 13:57:56 From: Laurie Raley Subject: Who Invented Imaginary Numbers? Hello, I am a high school student Chicago, IL, and my class just started studying imaginary numbers.
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mathforum.org/library/drmath/view/52584.html
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What is an imaginary number? What is i?; Contrary to what some people might tell you, imaginary numbers are not numbers that only exist in the brains of weird people. ... i was invented because people wanted to be able to take square roots of negative numbers, and you can't do that if you limit yourself to real numbers.
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mathforum.org/dr.math/faq/faq.imag.num.html
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However, the numbers i and -i were called "imaginary" (an unfortunate choice of terminology which has remained to this day), because their existence was still not clearly understood. ... This is a question that has been bugging my A2T class - who first used i for imaginary numbers?
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www.math.toronto.edu/mathnet/questionCorner/complexorig...
www.math.toronto.edu/mathnet/questionCorner/complexorigin.html
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Re: Who invented 'imaginary numbers'? Date: Sun Jun 7 16:54:23 1998; Posted By: David Winsemius, MadSci Admin; Area of science: Other; ID: 897168940.Ot ... Imaginary numbers are part of what are now called complex numbers. Their "existence" arose as people searched for solutions to quadratic and higher order...
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www.madsci.org/posts/archives/aug98/897257078.Ot.r.html
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The question should be: "Who invented imaginary numberS?" ... Imaginary or Complex numbers were developed to satisfy a need, and that need was to solve certain complex equations. ... For future reference: try using the keywords "history imaginary numbers" on any online search engine (www.yahoo.com, www.google.com,
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www.madsci.org/posts/archives/jan2000/947528126.Sh.r.ht...
www.madsci.org/posts/archives/jan2000/947528126.Sh.r.html
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This new number was invented (discovered?) around the time of the Reformation. ... Anyway, this new number was called "i", standing for "imaginary", because "everybody knew" that i wasn't "real". (That's why you couldn't take the square root of ... that is, numbers without the "i" in them.) The imaginary is defined to be:
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www.purplemath.com/modules/complex.htm
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