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I. What is the transitive closure of { ( x , y ) i n Z Z | y = x 2 } ? What

I. What is the transitive closure of

{(x, y) i n Z Z | y = x 2} ?

What is the reflexive transitive closure of

{(x, y) i n Z Z | y = x + 2 v v y = x - 2} ?

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