Theorem: ε is always positive.
Proof: Let ε>0. 
Show this thread
-
Branches?
Yes the square root is multi valued over the complexes so you need to restrict the phase to a particular branch
-
-
Okie doke
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.