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when toggle format what by license comment
Jun 7, 2014 at 10:03 comment added smyrlis A complete answer appears in math.stackexchange.com/questions/821818/…
Jun 6, 2014 at 13:26 history edited smyrlis CC BY-SA 3.0
added 251 characters in body
Jun 6, 2014 at 13:12 answer added Jean Van Schaftingen timeline score: 4
Jun 6, 2014 at 12:49 history asked smyrlis CC BY-SA 3.0