Goodarz Mehr
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 Apr 27 accepted $6$ points in plane with specific distances Apr 27 comment $6$ points in plane with specific distances Thanks a lot. And would you please place a picture of the figure you say in your post? Apr 23 comment $6$ points in plane with specific distances Would you please explain more? I couldn't Undrestand what you said. Thanks Apr 17 awarded Promoter Apr 17 comment $6$ points in plane with specific distances But then we get that $BEDC$ is a cyclic quadrilateral! Apr 13 comment $6$ points in plane with specific distances I've written how to construct that example. Apr 13 revised $6$ points in plane with specific distances added 276 characters in body Apr 13 asked $6$ points in plane with specific distances Mar 9 accepted a 2 distance set has an upper bound for number of its elements Feb 28 awarded Critic Feb 27 comment A question of Logic in Olympiad Let me explain what was the problem: I translated this question from persian language into English, and, actually both words ''wrong'' and ''false'' go to the same word in persian, namely ''غلط''. when I was translating them, I translated all of the words ''غلط'' to ''false'', except that one, which I translated it to ''wrong''. now when I was reading the problem, I decided to change that one to ''false'' too. Feb 27 comment A question of Logic in Olympiad I'v edited my post. thanks. Feb 27 comment A question of Logic in Olympiad @magma: I doubt if there will be any official solution, since it appeared in a multiple choice exam, but if there was one, I'll inform you. Feb 27 revised A question of Logic in Olympiad a mistake.... Feb 27 comment minimum number of vertices for a specific graph thanks a lot. really really beautiful!!!! Feb 27 accepted minimum number of vertices for a specific graph Feb 27 comment minimum number of vertices for a specific graph thats really a great example!!! but how to prove there isn't such a graph having smaller number of vertices? Feb 27 asked A question of Logic in Olympiad Feb 26 comment minimum number of vertices for a specific graph what's the advantage of doing that? Feb 26 asked minimum number of vertices for a specific graph