I'm defining branch cut functions, and I'm using $\arg(z)$ as a building block. So I just spent an hour at the whiteboard assuming that $\arg(z)$ goes from $0$ to $2\pi$, and then I implement the code, and everything goes horribly wrong.
I just realized that the problem is that the the
Arg function built into Mathematica goes from $-\pi$ to $\pi$. Is there anyway I can redefine
Arg so that my code will work?