Answer: Is (S, R) a poset if S is the set of all people in
Chapter 8, Problem 8.6.3(choose chapter or problem)
Is (S, R) a poset if S is the set of all people in the world and (a , b) E R, where a and b are people, if a) a is taller than b? b) a is not taller than b? c) a = b or a is an ancestor of b? d) a and b have a common friend?
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