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Differential of a complex number

  1. Oct 28, 2012 #1
    What is d/di(x+iy)?
  2. jcsd
  3. Oct 28, 2012 #2
    I'm guessing you meant


    Assuming all the usual stuff in real and complex analysis apply here, of course.

  4. Oct 28, 2012 #3
    Isn't the imaginary unit a constant?
  5. Oct 28, 2012 #4

    I guess it is, yet the OP regards it as a variable in his question, so...

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