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when toggle format what by license comment
Feb 5, 2020 at 17:33 history edited YCor CC BY-SA 4.0
fixed typo
Dec 4, 2013 at 8:54 comment added Zhang He It is a great help,thank you very much!
Dec 4, 2013 at 8:51 vote accept Zhang He
Dec 4, 2013 at 8:48 history edited András Bátkai CC BY-SA 3.0
expanded according to question in comments.
Dec 4, 2013 at 7:45 comment added Zhang He thanks for your answer! can you tell me how to compute it?
Dec 4, 2013 at 7:40 history answered András Bátkai CC BY-SA 3.0