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Find the descendant of b

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Reference no: EM131574681

Question: Is (S, R) a poset if S is the set of all people in the world and (a, b) ∈ R, where a and b are people, if

a) a is no shorter than b?

b) a weighs more than b?

c) a = b or a is a descendant of b?

d) a and b do not have a common friend?

Reference no: EM131574681

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