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Aug 6, 2021 at 18:03 history edited Sándor Kovács CC BY-SA 4.0
added 428 characters in body
Aug 6, 2021 at 17:46 history edited Sándor Kovács CC BY-SA 4.0
added 54 characters in body
Aug 6, 2021 at 17:37 comment added Sándor Kovács @ogogmad: Thanks! You are totally correct, that was a silly typo. It is corrected now.
Aug 6, 2021 at 17:35 history edited Sándor Kovács CC BY-SA 4.0
added 4 characters in body
Aug 6, 2021 at 12:06 comment added wlad The set $\{(x,y) \mid x^2 = \lambda\}$ for $\lambda \neq 0$ is not a parabola, but the union of two vertical lines.
Dec 31, 2012 at 17:26 vote accept minimax
Dec 31, 2012 at 17:26
Feb 13, 2011 at 0:46 history edited Sándor Kovács CC BY-SA 2.5
added 2 characters in body; added 322 characters in body
Feb 13, 2011 at 0:33 history edited Sándor Kovács CC BY-SA 2.5
added 621 characters in body
Feb 12, 2011 at 23:57 history answered Sándor Kovács CC BY-SA 2.5