totie3442 totie3442 22-05-2023 Mathematics contestada 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 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?
