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`m` is said to be related to `n` if `m` and `n` are integers and `m-n` is divisible by 13. Does this define an equivalence relation?

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We observe the following properties of relation `R`.

Let `R=\{(m, n): m, n \in Z: m-n` is divisible by 13`\}`

Relexivity : Let `m` be an arbitrary element of `Z`. Then,

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