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when toggle format what by license comment
May 23, 2011 at 15:54 vote accept Ricky
May 23, 2011 at 14:36 comment added Tom Goodwillie So my answer to the linked question was wrong, at least in cases when the ground ring is not a field.
May 23, 2011 at 10:42 history answered naf CC BY-SA 3.0