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Consider the following relations on {1, 2, 3}. R1 = {(1, 1), (1, 3), (2, 2), (3, 1)} R2 ((1, 1), (2, 2), (3,
Consider the following relations on {1, 2, 3}. R1 = {(1, 1), (1, 3), (2, 2), (3, 1)} R2 ((1, 1), (2, 2), (3, 1), (3, 3)} %3D R3 = ((1, 2), (2, 1), (3, 3)} R4 = ((1, 3), (2, 3)} %3D (a) Which of these relations are reflexive? Justify your answers. (b) Which of these relations are symmetric? Justify your answers. (c) Which of these relations are antisymmetric? Justify your answers. (d) Which of these relations are transitive? Justify your answers.
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Fundamentals of Database Systems
Authors: Ramez Elmasri, Shamkant Navathe
6th edition
136086209, 978-0136086208
