Skip to main content
4 events
when toggle format what by license comment
Nov 7, 2011 at 13:19 vote accept Chulumba
Nov 7, 2011 at 11:01 history edited Martin Brandenburg CC BY-SA 3.0
added 250 characters in body; added 14 characters in body
Nov 7, 2011 at 10:51 comment added Chulumba Oh, I see. Thanks Martin. I already knew the other proof you described in the last line. But I was stuck why I could not progress the way I described in my question.
Nov 7, 2011 at 10:47 history answered Martin Brandenburg CC BY-SA 3.0