25 Dec
2018
25 Dec
'18
2:55 p.m.
On Dec 25, 2018, at 2:16 PM, Dan Asimov <dasimov@earthlink.net> wrote:
PS For more fun with the Klein bottle, identify the exactly 5 classes of (unoriented) simple closed curves on it that cannot be deformed one to the other.
I take it these are the elements of the fundamental group, with inverses identified? - Cris