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Timeline for Is this square a push-out square?

Current License: CC BY-SA 3.0

5 events
when toggle format what by license comment
May 4, 2013 at 5:39 vote accept HHH
May 4, 2013 at 5:40
May 3, 2013 at 14:27 comment added Fernando Muro Yes, indeed, corrected.
May 3, 2013 at 14:27 history edited Fernando Muro CC BY-SA 3.0
edited body
May 3, 2013 at 13:37 comment added HHH Thank you for your answer. But I can't justify what do you mean by $R$. You may mean $E$. Am I right?
May 3, 2013 at 10:14 history answered Fernando Muro CC BY-SA 3.0