Mathematics, 21.04.2020 17:51, janeriaw188

4. Determine which of the following are equivalence relations and/or partial CHAPTER 6. RELATIONS 121 ordering relations for the given sets: (a) A = { lines in the plane}, and r defined by xry if and only if x is parallel to y. Assume every line is parallel to itself. (b) A = R and r defined by xry if and only if |x − y| ≤ 7.

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4. Determine which of the following are equivalence relations and/or partial CHAPTER 6. RELATIONS 12...