平面上有N个点,使得任取三点,必有至少两点间的距离是1。问N的最大值是多少?
请教一个从网上发现的题。
所有跟帖:
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7.
-jinjing-
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08/09/2011 postreply
11:09:02
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请教,能不能说说证明?
-wxcfan123-
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08/09/2011 postreply
11:25:29
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Thx,I t should be 8, It construct by 4 Tringles. Busiy now.
-jinjing-
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08/09/2011 postreply
13:18:12
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I construct for you.
-jinjing-
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08/09/2011 postreply
15:59:07
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回复:I construct for you. I learned from BUYI.using "o",
-jinjing-
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08/09/2011 postreply
16:27:21
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6
-布衣之才-
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08/09/2011 postreply
13:21:17
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for 6,Two E-L Tringles can be put anywhere.
-jinjing-
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08/09/2011 postreply
16:46:53
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please check n=8.
-jinjing-
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08/09/2011 postreply
17:39:54
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回复:请教一个从网上发现的题。
-康MM-
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08/09/2011 postreply
16:02:10
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KMM,please check my answer.
-jinjing-
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08/09/2011 postreply
16:29:21
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谢谢康MM的提示。N=7已被构造出来了(见内)。N=8,可能还是不能?
-wxcfan123-
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08/09/2011 postreply
16:46:30
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n=8,I got it.I made mestakes as too much number,you check my sec
-jinjing-
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08/09/2011 postreply
17:13:59
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check o1, o4, o8. o1-o8 and o1-o4 > 1 and o4-o8 < 1,
-wxcfan123-
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08/09/2011 postreply
18:08:30
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you are right.thx.
-jinjing-
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08/09/2011 postreply
18:09:58
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first also is right,you are good ,if you say yes, i'm happy.
-jinjing-
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08/09/2011 postreply
17:38:13
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康MM的提示应改为连接。构造是从康MM的跟贴转抄来的。
-wxcfan123-
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08/09/2011 postreply
17:55:15
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不能,证明不难的
-康MM-
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08/11/2011 postreply
04:05:06
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我也有一个证明,等几天再说吧,反正这里翻页很慢。
-wxcfan123-
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08/11/2011 postreply
06:55:40
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My proof.
-jinjing-
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08/11/2011 postreply
07:25:46
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回复:My proof.
-wxcfan123-
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08/11/2011 postreply
09:37:56
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Your proof is wrong in logic.
-jinjing-
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08/11/2011 postreply
11:59:32
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From E.LTrils, plus one point at most incrse 2A, 1B, later 2A,2B
-jinjing-
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08/11/2011 postreply
15:20:59
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FG=1?
-15少-
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08/11/2011 postreply
23:31:12
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回复:FG=1?
-wxcfan123-
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08/12/2011 postreply
06:46:13
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The intui tion solution. 15young ,this is ...
-jinjing-
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08/12/2011 postreply
09:03:06
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还是把我的解交上来供大家审阅吧
-wxcfan123-
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08/11/2011 postreply
13:25:43
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Fact2 is not true
-15少-
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08/13/2011 postreply
12:31:23
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Since AB<>1, for any point C, either AC = 1, or BC =1.
-wxcfan123-
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08/13/2011 postreply
13:41:20
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or ABC is not triangle
-15少-
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08/13/2011 postreply
13:47:49
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For arbirary three points, at least one distance of a pair is 1.
-wxcfan123-
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08/13/2011 postreply
13:53:22
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It this is true, you can put any number points on one line.
-wxcfan123-
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08/13/2011 postreply
13:56:48
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sorry, i misunderstand the question
-15少-
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08/13/2011 postreply
14:09:50