Take the same group of people and consider the relation "strictly taller than." Is this relation transitive? Is it reflexive? Is it complete?
Added by Richard R.
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Transitivity: For a relation to be transitive, if A is taller than B and B is taller than C, then A must be taller than C. In this case, if person A is strictly taller than person B, and person B is strictly taller than person C, then it follows that person A must Show more…
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Consider a group of people $A, B, C$ and the relation "at least as tall as," as in "A is at least as tall as $\mathrm{B}$." Is this relation transitive? Is it complete?
Which of these relations on the set of all people are equivalence relations? Determine the properties of an equivalence relation that the others lack. a) $\{(a, b) | a \text { and } b \text { are the same age }\}$ b) $\{(a, b) | a \text { and } b \text { have the same parents }\}$ c) $\{(a, b) | a \text { and } b \text { share a common parent }\}$ d) $\{(a, b) | a \text { and } b \text { have met }\}$ e) $\{(a, b) | a \text { and } b \text { speak a common language }\}$
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Equivalence Relations
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