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S Feb 21, 2018 at 15:27 history suggested Nikita Kalinin CC BY-SA 3.0
corrected \Phi_1(z,x) to \Phi_1(z,y)
Feb 21, 2018 at 14:16 review Suggested edits
S Feb 21, 2018 at 15:27
Sep 17, 2016 at 2:44 history edited fedja CC BY-SA 3.0
edited body
Sep 17, 2016 at 1:54 history edited fedja CC BY-SA 3.0
added 10 characters in body
Sep 17, 2016 at 1:46 history answered fedja CC BY-SA 3.0