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Apr 13, 2017 at 12:57 history edited CommunityBot
replaced http://mathoverflow.net/ with https://mathoverflow.net/
Feb 10, 2010 at 20:50 answer added Ewan Delanoy timeline score: 3
Jan 31, 2010 at 5:29 comment added Douglas S. Stones I think I'll delete my "answer" below, since it doesn't seem to be of value to this problem. Although, I'll leave the remark that if the $x_i$ in (*) are allowed to be chosen from the set of integers. Then you can choose $x_2=x_3=\cdots=x_n=0$ and $x_1=ka_1$ to get a solution.
Jan 31, 2010 at 3:13 history edited Hailong Dao CC BY-SA 2.5
added 302 characters in body; edited tags; edited title; added 3 characters in body
Jan 28, 2010 at 11:21 comment added Hailong Dao @Douglas: I used brute force but did not check everything carefully.
Jan 28, 2010 at 10:16 comment added Douglas Zare Could you elaborate on "probably (3,1)?"
Jan 27, 2010 at 18:17 history edited Hailong Dao CC BY-SA 2.5
added 144 characters in body
Jan 27, 2010 at 3:48 history asked Hailong Dao CC BY-SA 2.5