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when toggle format what by license comment
Nov 15, 2019 at 12:36 comment added Hosein Rahnama @bubba: see the comment of littleO below this question.
Aug 18, 2013 at 3:34 comment added bubba How do we know that a left inverse ($C$) exists?
Aug 18, 2013 at 3:25 history answered user65985 CC BY-SA 3.0