Is (S,R) a poset if S is the set of all people in the world and (a,

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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?

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Discrete Mathematics and Its Applications

ISBN: 978-0073383095

7th edition

Authors: Kenneth H. Rosen

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Question Posted: May 03, 2016 01:51 AM

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Is (S,R) a poset if S is the set of all people in the world and (a,

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The query in each case is whether the relation is reflexive antisymmetric and transitive a Since nob...View the full answer

Discrete Mathematics and Its Applications

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