Subject: Question for the list
From: "John Olsen"
Date: Thu, 22 Feb 2007 22:26:17 -0300
Consider a three dimensional lens space S3/\Z_k with an action of Z_2
+ Z_2. If k is odd this space is a Z_2 cohomology sphere and hence the
action is not free. If k is even is it still true that the action
cannot be free?
Any references are much appreciated!
Thank you,
John Olsen