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Domain

Let A= 2, 3...

Question

Let $A = {2, 3, 5, 7, 10}$ show that the relation
(i) $R_{1}$ is A defined as "is equal to" is an identify relation. (ii) $R_{2}$ is A defined as "difference is an integer" is the universal relation in A.

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Solution

$A = {2, 3, 5, 7, 10}$
$R_{1} = {(2, 2), (3, 3), (5, 5), (7, 7), (10, 10)}$
$R_{2} = A \times A$

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