two comments...

来源: dynamic 2009-04-25 02:48:44 [] [旧帖] [给我悄悄话] 本文已被阅读: 次 (275 bytes)
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回答: 朋友们试试这个,不知道几星群众丁2009-04-22 09:04:08
1. the proof of claim 2 is correct but incomplete. the border grids need to be discussed separately.

2. the construction only works for n mod 4 = 1. If n mod 4 = 3, then the number of red grids in claim 2 and 3 are the same. let me think what to do in this case...

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one more comment -dynamic- 给 dynamic 发送悄悄话 (1066 bytes) () 04/25/2009 postreply 03:02:49

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