Indeed, nowadays no electrical engineer could get along without complex numbers, and neither could anyone working in aerodynamics or fluid dynamics.
Keith DevlinI've never met Hans Rosling, but I just knew him through his many YouTube videos, and they were absolute dynamite.
Keith DevlinI firmly believe that mathematics does not exist outside of humans. It is something we, as a species, invent.
Keith DevlinA PhD in Mathematics is three years of guessing it wrong, plus one week of getting it right and writing a dissertation.
Keith DevlinThough the structures and patterns of mathematics reflect the structure of, and resonate in, the human mind every bit as much as do the structures and patterns of music, human beings have developed no mathematical equivalent to a pair of ears. Mathematics can only be "seen" with the "eyes of the mind". It is as if we had no sense of hearing, so that only someone able to sight read music would be able to appreciate its patterns and harmonies.
Keith DevlinIn addition to its use in arithmetic and science, the Hindu-Arabic number system is the only genuinely universal language on Earth, apart perhaps for the Windows operating system, which has achieved the near universal adoption of a conceptually and technologically poor product by the sheer force of market dominance.
Keith Devlin