Properties of Relations: Sample Problems

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In this video, I work through some examples of determine whether relations have certain properties. If the relation does not have the property, we must find a counterexample. If the relation does have the property, we must write a short proof.
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Thanks very much for this upload, very good explanation.

valeriereid
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At 5:55, looks like it is not a negation of reflexive (ie there exist an element x in the relation such that (x, x) is not in R).

algorithmo