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when toggle format what by license comment
Feb 27, 2013 at 11:10 vote accept Jochen Wengenroth
Feb 26, 2013 at 20:03 history edited Andreas Blass CC BY-SA 3.0
put x into the list of generators
Feb 26, 2013 at 20:02 comment added Andreas Blass Right; I'll edit the answer to add $x$ as a generator. Thanks.
Feb 26, 2013 at 19:38 comment added Jochen Wengenroth Looks very good ($x$ should also belong to the generators). Thank you very much.
Feb 26, 2013 at 14:02 history answered Andreas Blass CC BY-SA 3.0