推 feabries:({1,2},{2})屬於R 而且({2},{2,3})屬於R 11/17 00:12
→ feabries:但({1,2},{2,3})不屬於R 不滿足遞宜性 11/17 00:13
→ jim055006:鋼溫!! 11/17 22:45
因為包含於的符號打不出來,所以我用(=代替一下
題目如下:
Let 'A(=B' denote 'A is a subset of B'. Let X be a nonempty set and P(X) be the
power set of X. We define a binary relation R on P(X) as
R={(C,D)|(C(=D) or (D(=C)}
Is R an equivalence relation?
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答案是NO
我做出來的答案也是NO
只是不滿足的條件跟答案有點出入
所以想請高手們可否證一下
讓小弟參考一下....
鋼溫!!
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