why lnZ is not isolated singularity?
Because you can't define ln(z) to be holomorphic in the disk after removing 0. It has multiple branches.
Questions on Poles
I am trying to do my homework on:
Integration form 0 to infinity of [( log x)^4 ]/[1+x^2] dx =
by first defining what is a branch cut and how it will fit into the above integrand.
Re: Questions on Poles
I don't recommend posting a brand new question onto an existing thread. Start a new one. While you're doing that figure out how to start the problem so you can post an attempt. Where are the poles?
How do I start the new threads?
The poles is x= +/- i
Go to the Calculus and Beyond forum and under Forum Tools you'll find start new thread.
Separate names with a comma.