[User23]

Have you happened to have read Visual Complex Analysis?

If not I think you might like it.

And a tangent from your username: I quite like how complex numbers and functions like CIS made it into Common Lisp.

[lisper]

Nope. Thanks for the pointer. And thanks for pointing out CIS. I've been coding in CL since before it was standardized and I had never run across that before. But yes, one of the things I love about CL is that I can do (expt (sqrt -1) (sqrt -1)) and get the right answer.