To a nonmathematician, having the letter "i" represent a number that does not quite exist and is "imaginary" can be hard to ...

It's called "i", and it's part of a whole class of numbers called imaginary numbers. MARCUS DU SAUTOY:'Introducing these strange new numbers into mathematics 'required an act of the imagination.

(THE CONVERSATION) To a nonmathematician, having the letter “i” represent a number that does not quite exist and is “imaginary” can be hard to wrap your head around. If you open your mind ...

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