八點八邊圖 - 拼圖
By Wallis
at 2014-07-30T11:42
at 2014-07-30T11:42
Table of Contents
證明或反證
任意給一個八點八邊圖,(規定每個點的degree至少要是一 )
你一定都可以在點中填入三個 1 三個-1 及兩個 0
使得所有邊的左右兩點之積必不為 -1 .(換句話說 1 和 -1不相鄰)
ex:
1 -- 1 0 1 -- 1 --1 -- 0 --(-1)--(-1)
\ / / \ / /
1 -- 0--(-1) 0 -- (-1)
(-1)--(-1)
--
Tags:
拼圖
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