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R1={(a,b), a,b in N ,abs(a-b) le 13} R2=...

`R_1={(a,b), a,b in N ,abs(a-b) le 13}`
`R_2={(a,b), a,b in N, abs(a-b) ne 13}`
If the `R-1 & R_2` are equivalent relations or not ?

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