题目内容
The relation {(2, 4), (4, 2)} on the set {1, 2, 3, 4}, is anti-symmetric?()
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The relation {(1, 2), (2, 3), (3, 4)} on the set {1, 2, 3, 4}, is anti-symmetric? ()
The relation {(1, 1), (2, 2), (3, 3), (4, 4)} on the set {1, 2, 3, 4}, is anti-symmetric? ()
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