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when toggle format what by license comment
Apr 5, 2018 at 7:51 vote accept Dominic van der Zypen
Apr 5, 2018 at 5:56 answer added Peter Heinig timeline score: 2
Apr 5, 2018 at 5:18 history edited Peter Heinig CC BY-SA 3.0
Made the title more informative, thus facilitating future searches. Added the technical term 'rank', with a reference. Added a note that equal cardinalities of the edges are not required.
Apr 4, 2018 at 8:11 history asked Dominic van der Zypen CC BY-SA 3.0