Skip to main content
4 events
when toggle format what by license comment
Sep 14, 2011 at 14:38 comment added Todd Trimble Very neat, Andreas.
Sep 14, 2011 at 13:58 comment added Benjamin Steinberg I was looking for a proof like this last night, but you found it first!
Sep 14, 2011 at 13:41 comment added Chris Schommer-Pries This is a nice proof.
Sep 14, 2011 at 13:07 history answered Andreas Blass CC BY-SA 3.0