- #1
Applejacks
- 33
- 0
Homework Statement
http://imageshack.us/photo/my-images/15/unledflsq.png/
Homework Equations
A simply connected domain D in the complex plane is an open and path
connected set such that every simple closed path in D encloses only points of D.
The Attempt at a Solution
The answers are a,c and d.I don't understand why they all aren't simply connected. They are all path connected and open. Am I misunderstanding the definition of open?