I'm a mathematician who studies analysis: an area of math that deals with complex numbers. Unlike the more familiar real numbers—positive and negative integers, fractions, square roots ...

MARCUS DU SAUTOY:But when you start to think about it, there's something deeply strange about negative numbers because they don't seem to correspond to anything real at all. MARCUS DU SAUTOY:'The ...

William Ross does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...