4 ms·

There are no NaN values in the real numbers.

• fanf2 6y ago
  You need some way to cope with operations that don’t have real results for some values, such as log and sqrt of negative numbers
  • molyss 6y ago
    you can just represent those as a pair of real numbers, one for the real part, and one for the imaginary part. As long as you only (recursively) apply exponential and trig functions on those numbers, I believe you'll stay within the realm of complex numbers.
    • flubert 6y ago
      0/0, tan(pi/2), log(0)
      • molyss 6y ago
        I was replying to the sqrt and log of negative numbers. For undefined functions, I'd throw an exception
    • fanf2 6y ago
      True, but I thought this was about real arithmetic not complex arithmetic