Draw the directed graphs of the relations defined in 13-18.
Let and define a relation S on A as follows: For every
Draw the directed graph of the relation.
and relation S is defined as
holds when and thus when x − y is divisible by 2. However, x − y is divisible by 2 when x and y are both even, but also when x and y are both odd.
Thus, the relation S is then:
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