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• n  (mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1

• complex number
• complex quantity
• imaginary

News & Articles

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• Money $marts: When there's no limit to the imagination
  Way back in the time of the Reformation, someone invented imaginary numbers. Unlike Newton's calculus construct, there didn't seem to be any use for pretend numbers, so why bother?
  July 2, 2013 - Naples Daily News