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σα (R) = {<1, 2, 1, 2>} kui α = (A >= 1 & B = 2 & C <= 1)
σα (R) = {<1, 2, 1, 2> } kui α = (A >= 1, B <= 2, C >= 1, D = 2)
σα (R) = {<1, 2, 1, 2>} kui α = (A = 1 & B <= 0 & C <= 1)
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