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May 30, 2017 at 19:00 vote accept Dominic van der Zypen
May 30, 2017 at 9:34 history edited user1272680 CC BY-SA 3.0
added 28 characters in body
May 30, 2017 at 9:31 comment added Peter Heinig A correct statement is "every edge-critical graph without isolated vertices must be vertex-critical". Consider the minimal example $\bullet\ \bullet\text{-}\bullet$. Would you please edit-in this condition?
May 30, 2017 at 7:05 history answered user1272680 CC BY-SA 3.0