- #1
ehrenfest
- 2,020
- 1
Homework Statement
http://en.wikipedia.org/wiki/Essential_singularity
What is the best way to prove that e^{1/z} has an essential singularity at z=0? I have tried showing that
[tex]\lim_{z\to 0} z^k e^{1/z}[/tex]
does not exist for any natural number k, but I couldn't get it.